diff --git a/includes/admin/class-admin.php b/includes/admin/class-admin.php
index 1d5ce2a2..d503b5cf 100644
--- a/includes/admin/class-admin.php
+++ b/includes/admin/class-admin.php
@@ -767,10 +767,10 @@ if ( ! class_exists( 'um\admin\Admin' ) ) {
 						'sanitize' => 'absint',
 					),
 					'_min'                            => array(
-						'sanitize' => 'absint',
+						'sanitize' => 'empty_int',
 					),
 					'_max'                            => array(
-						'sanitize' => 'absint',
+						'sanitize' => 'empty_int',
 					),
 					'_min_chars'                      => array(
 						'sanitize' => 'absint',
@@ -1360,6 +1360,9 @@ if ( ! class_exists( 'um\admin\Admin' ) ) {
 					case 'int':
 						$sanitized[ $k ] = (int) $v;
 						break;
+					case 'empty_int':
+						$sanitized[ $k ] = ( '' !== $v ) ? (int) $v : '';
+						break;
 					case 'bool':
 						$sanitized[ $k ] = (bool) $v;
 						break;
@@ -1393,6 +1396,13 @@ if ( ! class_exists( 'um\admin\Admin' ) ) {
 							$sanitized[ $k ] = absint( $v );
 						}
 						break;
+					case 'empty_absint':
+						if ( is_array( $v ) ) {
+							$sanitized[ $k ] = array_map( 'absint', $v );
+						} else {
+							$sanitized[ $k ] = ( '' !== $v ) ? absint( $v ) : '';
+						}
+						break;
 				}
 			}
 
diff --git a/includes/admin/core/class-admin-settings.php b/includes/admin/core/class-admin-settings.php
index 237fb878..0b3e42a0 100644
--- a/includes/admin/core/class-admin-settings.php
+++ b/includes/admin/core/class-admin-settings.php
@@ -676,6 +676,12 @@ if ( ! class_exists( 'um\admin\core\Admin_Settings' ) ) {
 					'reset_require_strongpass'              => array(
 						'sanitize' => 'bool',
 					),
+					'password_min_chars'                    => array(
+						'sanitize' => 'absint',
+					),
+					'password_max_chars'                    => array(
+						'sanitize' => 'absint',
+					),
 					'profile_noindex'                       => array(
 						'sanitize' => 'bool',
 					),
@@ -1048,6 +1054,20 @@ if ( ! class_exists( 'um\admin\core\Admin_Settings' ) ) {
 										'label'   => __( 'Require a strong password? (when user resets password only)', 'ultimate-member' ),
 										'tooltip' => __( 'Enable or disable a strong password rules on password reset and change procedure', 'ultimate-member' ),
 									),
+									array(
+										'id'      => 'password_min_chars',
+										'type'    => 'number',
+										'label'   => __( 'Password minimum length', 'ultimate-member' ),
+										'tooltip' => __( 'If you want to enable a minimum number of characters to be in password. User password field in the UM forms has own settings for that. Leave empty to use default value 8', 'ultimate-member' ),
+										'size'    => 'small',
+									),
+									array(
+										'id'      => 'password_max_chars',
+										'type'    => 'number',
+										'label'   => __( 'Password maximum length', 'ultimate-member' ),
+										'tooltip' => __( 'If you want to enable a maximum number of characters to be in password. User password field in the UM forms has own settings for that. Leave empty to use default value 30', 'ultimate-member' ),
+										'size'    => 'small',
+									),
 									array(
 										'id'      => 'profile_noindex',
 										'type'    => 'select',
diff --git a/includes/class-config.php b/includes/class-config.php
index e8ccfc92..ab3fa770 100644
--- a/includes/class-config.php
+++ b/includes/class-config.php
@@ -523,6 +523,8 @@ if ( ! class_exists( 'um\Config' ) ) {
 				'use_um_gravatar_default_builtin_image' => 'default',
 				'use_um_gravatar_default_image'         => 0,
 				'reset_require_strongpass'              => 0,
+				'password_min_chars'                    => 8,
+				'password_max_chars'                    => 30,
 				'account_tab_password'                  => 1,
 				'account_tab_privacy'                   => 1,
 				'account_tab_notifications'             => 1,
diff --git a/includes/class-functions.php b/includes/class-functions.php
index 4fd75217..3a770725 100644
--- a/includes/class-functions.php
+++ b/includes/class-functions.php
@@ -391,5 +391,20 @@ if ( ! class_exists( 'UM_Functions' ) ) {
 			}
 		}
 
+
+		/**
+		 * Replace the first match in the string, alternative for the `str_replace()` function
+		 *
+		 * @param string $search
+		 * @param string $replace
+		 * @param string $subject
+		 *
+		 * @return string
+		 */
+		function str_replace_first( $search, $replace, $subject ) {
+			$search = '/' . preg_quote( $search, '/' ) . '/';
+			return preg_replace( $search, $replace, $subject, 1 );
+		}
+
 	}
 }
diff --git a/includes/core/class-password.php b/includes/core/class-password.php
index 852dd02c..b6e0605b 100644
--- a/includes/core/class-password.php
+++ b/includes/core/class-password.php
@@ -543,12 +543,17 @@ if ( ! class_exists( 'um\core\Password' ) ) {
 
 			if ( UM()->options()->get( 'reset_require_strongpass' ) ) {
 
-				if ( strlen( utf8_decode( $args['user_password'] ) ) < 8 ) {
-					UM()->form()->add_error( 'user_password', __( 'Your password must contain at least 8 characters', 'ultimate-member' ) );
+				$min_length = UM()->options()->get( 'password_min_chars' );
+				$min_length = ! empty( $min_length ) ? $min_length : 8;
+				$max_length = UM()->options()->get( 'password_max_chars' );
+				$max_length = ! empty( $max_length ) ? $max_length : 30;
+
+				if ( mb_strlen( $args['user_password'] ) < $min_length ) {
+					UM()->form()->add_error( 'user_password', sprintf( __( 'Your password must contain at least %d characters', 'ultimate-member' ), $min_length ) );
 				}
 
-				if ( strlen( utf8_decode( $args['user_password'] ) ) > 30 ) {
-					UM()->form()->add_error( 'user_password', __( 'Your password must contain less than 30 characters', 'ultimate-member' ) );
+				if ( mb_strlen( $args['user_password'] ) > $max_length ) {
+					UM()->form()->add_error( 'user_password', sprintf( __( 'Your password must contain less than %d characters', 'ultimate-member' ), $max_length ) );
 				}
 
 				if ( ! UM()->validation()->strong_pass( $args['user_password'] ) ) {
diff --git a/includes/core/class-user.php b/includes/core/class-user.php
index 00ef054c..6488f035 100644
--- a/includes/core/class-user.php
+++ b/includes/core/class-user.php
@@ -15,6 +15,14 @@ if ( ! class_exists( 'um\core\User' ) ) {
 	class User {
 
 
+		/**
+		 * Data that we will set before the update profile to compare it after update
+		 *
+		 * @var null
+		 */
+		public $previous_data = null;
+
+
 		/**
 		 * User constructor.
 		 */
diff --git a/includes/core/um-actions-account.php b/includes/core/um-actions-account.php
index 1e4feb6a..93126416 100644
--- a/includes/core/um-actions-account.php
+++ b/includes/core/um-actions-account.php
@@ -82,12 +82,17 @@ function um_submit_account_errors_hook( $args ) {
 				}
 
 				if ( UM()->options()->get( 'account_require_strongpass' ) ) {
-					if ( strlen( utf8_decode( $args['user_password'] ) ) < 8 ) {
-						UM()->form()->add_error( 'user_password', __( 'Your password must contain at least 8 characters', 'ultimate-member' ) );
+					$min_length = UM()->options()->get( 'password_min_chars' );
+					$min_length = ! empty( $min_length ) ? $min_length : 8;
+					$max_length = UM()->options()->get( 'password_max_chars' );
+					$max_length = ! empty( $max_length ) ? $max_length : 30;
+
+					if ( mb_strlen( $args['user_password'] ) < $min_length ) {
+						UM()->form()->add_error( 'user_password', sprintf( __( 'Your password must contain at least %d characters', 'ultimate-member' ), $min_length ) );
 					}
 
-					if ( strlen( utf8_decode( $args['user_password'] ) ) > 30 ) {
-						UM()->form()->add_error( 'user_password', __( 'Your password must contain less than 30 characters', 'ultimate-member' ) );
+					if ( mb_strlen( $args['user_password'] ) > $max_length ) {
+						UM()->form()->add_error( 'user_password', sprintf( __( 'Your password must contain less than %d characters', 'ultimate-member' ), $max_length ) );
 					}
 
 					if ( ! UM()->validation()->strong_pass( $args['user_password'] ) ) {
@@ -370,8 +375,24 @@ function um_submit_account_details( $args ) {
 	 */
 	do_action( 'um_account_pre_update_profile', $changes, $user_id );
 
-	UM()->user()->update_profile( $changes );
+	if ( isset( $changes['first_name'] ) || isset( $changes['last_name'] ) || isset( $changes['nickname'] ) ) {
+		$user = get_userdata( $user_id );
+		if ( ! empty( $user ) && ! is_wp_error( $user ) ) {
+			UM()->user()->previous_data['display_name'] = $user->display_name;
 
+			if ( isset( $changes['first_name'] ) ) {
+				UM()->user()->previous_data['first_name'] = $user->first_name;
+			}
+			if ( isset( $changes['last_name'] ) ) {
+				UM()->user()->previous_data['last_name'] = $user->last_name;
+			}
+			if ( isset( $changes['nickname'] ) ) {
+				UM()->user()->previous_data['nickname'] = $user->nickname;
+			}
+		}
+	}
+
+	UM()->user()->update_profile( $changes );
 
 	if ( UM()->account()->is_secure_enabled() ) {
 		update_user_meta( $user_id, 'um_account_secure_fields', array() );
@@ -497,7 +518,7 @@ add_action( 'um_before_account_notifications', 'um_before_account_notifications'
  * @param   array $changes  An array of fields values.
  */
 function um_after_user_account_updated_permalink( $user_id, $changes ) {
-	if ( isset( $changes['first_name'] ) && isset( $changes['last_name'] ) ) {
+	if ( isset( $changes['first_name'] ) || isset( $changes['last_name'] ) ) {
 		do_action( 'um_update_profile_full_name', $user_id, $changes );
 	}
 }
diff --git a/includes/core/um-actions-form.php b/includes/core/um-actions-form.php
index 40214488..ac20fdcf 100644
--- a/includes/core/um-actions-form.php
+++ b/includes/core/um-actions-form.php
@@ -595,7 +595,7 @@ function um_submit_form_errors_hook_( $args ) {
 				}
 
 				if ( isset( $array['min_chars'] ) && $array['min_chars'] > 0 ) {
-					if ( $args[ $key ] && strlen( utf8_decode( $args[ $key ] ) ) < $array['min_chars'] ) {
+					if ( $args[ $key ] && mb_strlen( $args[ $key ] ) < $array['min_chars'] ) {
 						if ( empty( $array['label'] ) ) {
 							UM()->form()->add_error( $key, sprintf( __( 'This field must contain at least %s characters', 'ultimate-member' ), $array['min_chars'] ) );
 						} else {
@@ -605,7 +605,7 @@ function um_submit_form_errors_hook_( $args ) {
 				}
 
 				if ( isset( $array['max_chars'] ) && $array['max_chars'] > 0 ) {
-					if ( $args[ $key ] && strlen( utf8_decode( $args[ $key ] ) ) > $array['max_chars'] ) {
+					if ( $args[ $key ] && mb_strlen( $args[ $key ] ) > $array['max_chars'] ) {
 						if ( empty( $array['label'] ) ) {
 							UM()->form()->add_error( $key, sprintf( __( 'This field must contain less than %s characters', 'ultimate-member' ), $array['max_chars'] ) );
 						} else {
@@ -895,7 +895,7 @@ function um_submit_form_errors_hook_( $args ) {
 				$profile_show_bio = UM()->options()->get( 'profile_show_bio' );
 
 				if ( $profile_show_bio ) {
-					if ( strlen( utf8_decode( str_replace( array( "\r\n", "\n", "\r\t", "\t" ), ' ', $args['description'] ) ) ) > $max_chars && $max_chars ) {
+					if ( mb_strlen( str_replace( array( "\r\n", "\n", "\r\t", "\t" ), ' ', $args['description'] ) ) > $max_chars && $max_chars ) {
 						UM()->form()->add_error( 'description', sprintf( __( 'Your user description must contain less than %s characters', 'ultimate-member' ), $max_chars ) );
 					}
 				}
@@ -921,4 +921,4 @@ function um_invalid_nonce_redirect_url( $url ) {
 	return $url;
 }
 add_filter( 'um_login_invalid_nonce_redirect_url', 'um_invalid_nonce_redirect_url', 10, 1 );
-add_filter( 'um_register_invalid_nonce_redirect_url', 'um_invalid_nonce_redirect_url', 10, 1 );
\ No newline at end of file
+add_filter( 'um_register_invalid_nonce_redirect_url', 'um_invalid_nonce_redirect_url', 10, 1 );
diff --git a/includes/core/um-actions-profile.php b/includes/core/um-actions-profile.php
index 92ccf3e5..25bb9b18 100644
--- a/includes/core/um-actions-profile.php
+++ b/includes/core/um-actions-profile.php
@@ -462,8 +462,27 @@ function um_user_edit_profile( $args ) {
 	 */
 	$to_update = apply_filters( 'um_user_pre_updating_profile_array', $to_update, $user_id );
 
-
 	if ( is_array( $to_update ) ) {
+
+		if ( isset( $to_update['first_name'] ) || isset( $to_update['last_name'] ) || isset( $to_update['nickname'] ) ) {
+			$user = get_userdata( $user_id );
+			if ( ! empty( $user ) && ! is_wp_error( $user ) ) {
+				UM()->user()->previous_data['display_name'] = $user->display_name;
+
+				if ( isset( $to_update['first_name'] ) ) {
+					UM()->user()->previous_data['first_name'] = $user->first_name;
+				}
+
+				if ( isset( $to_update['last_name'] ) ) {
+					UM()->user()->previous_data['last_name'] = $user->last_name;
+				}
+
+				if ( isset( $to_update['nickname'] ) ) {
+					UM()->user()->previous_data['nickname'] = $user->nickname;
+				}
+			}
+		}
+
 		UM()->user()->update_profile( $to_update );
 		/**
 		 * UM hook
diff --git a/includes/core/um-actions-register.php b/includes/core/um-actions-register.php
index e9a6afc0..9081cf43 100644
--- a/includes/core/um-actions-register.php
+++ b/includes/core/um-actions-register.php
@@ -350,7 +350,8 @@ function um_submit_form_register( $args ) {
 
 	$unique_userID = uniqid();
 
-	if ( empty( $user_login ) || strlen( $user_login ) > 30 && ! is_email( $user_login ) ) {
+	// see dbDelta and WP native DB structure user_login varchar(60)
+	if ( empty( $user_login ) || mb_strlen( $user_login ) > 60 && ! is_email( $user_login ) ) {
 		$user_login = 'user' . $unique_userID;
 		while ( username_exists( $user_login ) ) {
 			$unique_userID = uniqid();
diff --git a/includes/core/um-actions-save-profile.php b/includes/core/um-actions-save-profile.php
index 2a1a6232..fb2775d6 100644
--- a/includes/core/um-actions-save-profile.php
+++ b/includes/core/um-actions-save-profile.php
@@ -40,12 +40,48 @@ function um_update_profile_full_name( $user_id, $changes ) {
 			break;
 		case 'nickname':
 			$update_name = get_user_meta( $user_id, 'nickname', true );
+			break;
+		case 'default':
+			$user = get_userdata( $user_id );
+
+			if ( ! empty( $user ) && ! is_wp_error( $user ) ) {
+				if ( ! empty( UM()->user()->previous_data['display_name'] ) ) {
+					if ( isset( UM()->user()->previous_data['first_name'] ) ) {
+						$fname = get_user_meta( $user_id, 'first_name', true );
+						$update_name = UM()->str_replace_first( UM()->user()->previous_data['first_name'], $fname, UM()->user()->previous_data['display_name'] );
+					}
+
+					if ( isset( UM()->user()->previous_data['last_name'] ) ) {
+						$lname = get_user_meta( $user_id, 'last_name', true );
+						if ( isset( $update_name ) ) {
+							$update_name = UM()->str_replace_first( UM()->user()->previous_data['last_name'], $lname, $update_name );
+						} else {
+							$update_name = UM()->str_replace_first( UM()->user()->previous_data['last_name'], $lname, UM()->user()->previous_data['display_name'] );
+						}
+					}
+
+					if ( isset( UM()->user()->previous_data['nickname'] ) ) {
+						$nickname = get_user_meta( $user_id, 'nickname', true );
+						if ( isset( $update_name ) ) {
+							$update_name = UM()->str_replace_first( UM()->user()->previous_data['nickname'], $nickname, $update_name );
+						} else {
+							$update_name = UM()->str_replace_first( UM()->user()->previous_data['nickname'], $nickname, UM()->user()->previous_data['display_name'] );
+						}
+					}
+
+					// unset if the display name is the same
+					if ( isset( $update_name ) && $update_name === UM()->user()->previous_data['display_name'] ) {
+						unset( $update_name );
+					}
+				}
+			}
+
 			break;
 	}
 
 	if ( isset( $update_name ) ) {
 
-		$arr_user =  array( 'ID' => $user_id, 'display_name' => $update_name );
+		$arr_user = array( 'ID' => $user_id, 'display_name' => $update_name );
 		$return = wp_update_user( $arr_user );
 
 		if ( is_wp_error( $return ) ) {
@@ -54,7 +90,7 @@ function um_update_profile_full_name( $user_id, $changes ) {
 
 	}
 
-	if ( isset( $changes['first_name'] ) && isset( $changes['last_name'] ) ) {
+	if ( isset( $changes['first_name'] ) || isset( $changes['last_name'] ) ) {
 		$user = get_userdata( $user_id );
 		if ( ! empty( $user ) && ! is_wp_error( $user ) ) {
 			$full_name = $user->display_name;
@@ -67,4 +103,4 @@ function um_update_profile_full_name( $user_id, $changes ) {
 	// regenerate slug
 	UM()->user()->generate_profile_slug( $user_id );
 }
-add_action( 'um_update_profile_full_name', 'um_update_profile_full_name', 10, 2 );
\ No newline at end of file
+add_action( 'um_update_profile_full_name', 'um_update_profile_full_name', 10, 2 );
diff --git a/includes/core/um-filters-profile.php b/includes/core/um-filters-profile.php
index be4395b3..94a30568 100644
--- a/includes/core/um-filters-profile.php
+++ b/includes/core/um-filters-profile.php
@@ -66,7 +66,7 @@ function um_dynamic_user_profile_title( $title, $id = '' ) {
 		return $title;
 	}
 
-	return ( strlen( $title ) !== strlen( utf8_decode( $title ) ) ) ? $title : utf8_encode( $title );
+	return ( strlen( $title ) !== mb_strlen( $title ) ) ? $title : utf8_encode( $title );
 }
 add_filter( 'the_title', 'um_dynamic_user_profile_title', 100000, 2 );
 
@@ -158,4 +158,4 @@ function um_change_profile_photo_label( $fields ) {
 	}
 	return $fields;
 }
-add_filter( 'um_predefined_fields_hook', 'um_change_profile_photo_label', 10, 1 );
\ No newline at end of file
+add_filter( 'um_predefined_fields_hook', 'um_change_profile_photo_label', 10, 1 );
diff --git a/includes/um-short-functions.php b/includes/um-short-functions.php
index 092a21b9..4388bae4 100644
--- a/includes/um-short-functions.php
+++ b/includes/um-short-functions.php
@@ -14,7 +14,7 @@
  * @return string
  */
 function um_trim_string( $s, $length = 20 ) {
-	$s = strlen( $s ) > $length ? substr( $s, 0, $length ) . "..." : $s;
+	$s = mb_strlen( $s ) > $length ? substr( $s, 0, $length ) . "..." : $s;
 
 	return $s;
 }
@@ -2448,7 +2448,11 @@ function um_user( $data, $attrs = null ) {
 
 				foreach ( $fields as $field ) {
 					if ( um_profile( $field ) ) {
-						$name .= um_profile( $field ) . ' ';
+
+						$field_value = maybe_unserialize( um_profile( $field ) );
+						$field_value = is_array( $field_value ) ? implode( ',', $field_value ) : $field_value;
+
+						$name .= $field_value . ' ';
 					} elseif ( um_user( $field ) && $field != 'display_name' && $field != 'full_name' ) {
 						$name .= um_user( $field ) . ' ';
 					}
diff --git a/readme.txt b/readme.txt
index f467fb76..fcb51faf 100644
--- a/readme.txt
+++ b/readme.txt
@@ -159,11 +159,12 @@ The plugin works with popular caching plugins by automatically excluding Ultimat
 
 
 
-= 2.2.5: September 21, 2021 =
+= 2.2.5: September 22, 2021 =
 
 * Enhancements:
 
   - Added: Ability to insert SoundCloud track URL instead of Track ID
+  - Added: Settings for the password min/max length (Ultimate Member > Settings > Users)
 
 * Bugfixes:
 
@@ -172,6 +173,8 @@ The plugin works with popular caching plugins by automatically excluding Ultimat
   - Fixed: Restriction settings fields conditions on wp-admin screens
   - Fixed: Account `user_login` field validation removed as redundant. The field is disabled and not used in code flow
   - Fixed: `display_name` data update after First + Last name fields edition on the Account page
+  - Fixed: Password length validation on the Account page and Password Reset page
+  - Fixed: Using custom fields from multi-select dropdowns for user's `Display Name`. Unserialized custom field's values
 
 = 2.2.4: August 27, 2021 =