diff --git a/includes/admin/core/list-tables/roles-list-table.php b/includes/admin/core/list-tables/roles-list-table.php
index 0edff8a5..1ac73f4d 100644
--- a/includes/admin/core/list-tables/roles-list-table.php
+++ b/includes/admin/core/list-tables/roles-list-table.php
@@ -16,13 +16,15 @@ if ( isset( $_GET['action'] ) ) {
 	switch ( sanitize_key( $_GET['action'] ) ) {
 		/* delete action */
 		case 'delete': {
+			// uses sanitize_title instead of sanitize_key for backward compatibility based on #906 pull-request (https://github.com/ultimatemember/ultimatemember/pull/906)
+			// roles e.g. "潜水艦subs" with both latin + not-UTB-8 symbols had invalid role ID
 			$role_keys = array();
 			if ( isset( $_REQUEST['id'] ) ) {
 				check_admin_referer( 'um_role_delete' . sanitize_title( $_REQUEST['id'] ) . get_current_user_id() );
 				$role_keys = (array) sanitize_title( $_REQUEST['id'] );
 			} elseif ( isset( $_REQUEST['item'] ) ) {
 				check_admin_referer( 'bulk-' . sanitize_key( __( 'Roles', 'ultimate-member' ) ) );
-				$role_keys = array_map( 'sanitize_key', $_REQUEST['item'] );
+				$role_keys = array_map( 'sanitize_title', $_REQUEST['item'] );
 			}
 
 			if ( ! count( $role_keys ) ) {
@@ -88,13 +90,15 @@ if ( isset( $_GET['action'] ) ) {
 			break;
 		}
 		case 'reset': {
+			// uses sanitize_title instead of sanitize_key for backward compatibility based on #906 pull-request (https://github.com/ultimatemember/ultimatemember/pull/906)
+			// roles e.g. "潜水艦subs" with both latin + not-UTB-8 symbols had invalid role ID
 			$role_keys = array();
 			if ( isset( $_REQUEST['id'] ) ) {
-				check_admin_referer( 'um_role_reset' . sanitize_key( $_REQUEST['id'] ) . get_current_user_id() );
-				$role_keys = (array) sanitize_key( $_REQUEST['id'] );
+				check_admin_referer( 'um_role_reset' . sanitize_title( $_REQUEST['id'] ) . get_current_user_id() );
+				$role_keys = (array) sanitize_title( $_REQUEST['id'] );
 			} elseif ( isset( $_REQUEST['item'] ) ) {
 				check_admin_referer( 'bulk-' . sanitize_key( __( 'Roles', 'ultimate-member' ) ) );
-				$role_keys = array_map( 'sanitize_key', $_REQUEST['item'] );
+				$role_keys = array_map( 'sanitize_title', $_REQUEST['item'] );
 			}
 
 			if ( ! count( $role_keys ) ) {
@@ -342,22 +346,23 @@ class UM_Roles_List_Table extends WP_List_Table {
 	 */
 	function column_title( $item ) {
 		$actions = array();
+		// for backward compatibility based on #906 pull-request (https://github.com/ultimatemember/ultimatemember/pull/906)
+		// roles e.g. "潜水艦subs" with both latin + not-UTB-8 symbols had invalid role ID
+		$id = urlencode( $item['key'] );
 
-		$actions['edit'] = '<a href="admin.php?page=um_roles&tab=edit&id=' . urlencode( $item['key'] ) . '">' . __( 'Edit', 'ultimate-member' ) . '</a>';
+		$actions['edit'] = '<a href="admin.php?page=um_roles&tab=edit&id=' . esc_attr( $id ) . '">' . __( 'Edit', 'ultimate-member' ) . '</a>';
 
 		if ( ! empty( $item['_um_is_custom'] ) ) {
-			$actions['delete'] = '<a href="admin.php?page=um_roles&action=delete&id=' . urlencode( $item['key'] ) . '&_wpnonce=' . wp_create_nonce( 'um_role_delete' . $item['key'] . get_current_user_id() ) . '" onclick="return confirm( \'' . __( 'Are you sure you want to delete this role?', 'ultimate-member' ) . '\' );">' . __( 'Delete', 'ultimate-member' ) . '</a>';
+			$actions['delete'] = '<a href="admin.php?page=um_roles&action=delete&id=' . esc_attr( $id ) . '&_wpnonce=' . wp_create_nonce( 'um_role_delete' . $item['key'] . get_current_user_id() ) . '" onclick="return confirm( \'' . __( 'Are you sure you want to delete this role?', 'ultimate-member' ) . '\' );">' . __( 'Delete', 'ultimate-member' ) . '</a>';
 		} else {
 			$role_meta = get_option( "um_role_{$item['key']}_meta" );
 
 			if ( ! empty( $role_meta ) ) {
-				$actions['reset'] = '<a href="admin.php?page=um_roles&action=reset&id=' . urlencode( $item['key'] ) . '&_wpnonce=' . wp_create_nonce( 'um_role_reset' . $item['key'] . get_current_user_id() ) . '" onclick="return confirm( \'' . __( 'Are you sure you want to reset UM role meta?', 'ultimate-member' ) . '\' );">' . __( 'Reset UM Role meta', 'ultimate-member' ) . '</a>';
+				$actions['reset'] = '<a href="admin.php?page=um_roles&action=reset&id=' . esc_attr( $id ) . '&_wpnonce=' . wp_create_nonce( 'um_role_reset' . $item['key'] . get_current_user_id() ) . '" onclick="return confirm( \'' . __( 'Are you sure you want to reset UM role meta?', 'ultimate-member' ) . '\' );">' . __( 'Reset UM Role meta', 'ultimate-member' ) . '</a>';
 			}
 		}
 
-
-
-		return sprintf('%1$s %2$s', '<strong><a class="row-title" href="admin.php?page=um_roles&tab=edit&id=' . urlencode( $item['key'] ) . '">' . stripslashes( $item['name'] ) . '</a></strong>', $this->row_actions( $actions ) );
+		return sprintf('%1$s %2$s', '<strong><a class="row-title" href="admin.php?page=um_roles&tab=edit&id=' . esc_attr( $id ) . '">' . stripslashes( $item['name'] ) . '</a></strong>', $this->row_actions( $actions ) );
 	}
 
 
diff --git a/includes/admin/templates/role/role-edit.php b/includes/admin/templates/role/role-edit.php
index 2450020f..ea402be9 100644
--- a/includes/admin/templates/role/role-edit.php
+++ b/includes/admin/templates/role/role-edit.php
@@ -50,7 +50,9 @@ global $wp_roles;
 
 if ( ! empty( $_GET['id'] ) ) {
 
-	$role_id = sanitize_key( $_GET['id'] );
+	// uses sanitize_title instead of sanitize_key for backward compatibility based on #906 pull-request (https://github.com/ultimatemember/ultimatemember/pull/906)
+	// roles e.g. "潜水艦subs" with both latin + not-UTB-8 symbols had invalid role ID
+	$role_id = sanitize_title( $_GET['id'] );
 
 	$data = get_option( "um_role_{$role_id}_meta" );
 
@@ -96,9 +98,11 @@ if ( ! empty( $_POST['role'] ) ) {
 				$id             = 'custom_role_' . $auto_increment;
 			}
 
-			$redirect = add_query_arg( array( 'page'=>'um_roles', 'tab'=>'edit', 'id'=>$id, 'msg'=>'a' ), admin_url( 'admin.php' ) );
+			$redirect = add_query_arg( array( 'page' => 'um_roles', 'tab' => 'edit', 'id' => $id, 'msg' => 'a' ), admin_url( 'admin.php' ) );
 		} elseif ( 'edit' === sanitize_key( $_GET['tab'] ) && ! empty( $_GET['id'] ) ) {
-			$id = sanitize_key( $_GET['id'] );
+			// uses sanitize_title instead of sanitize_key for backward compatibility based on #906 pull-request (https://github.com/ultimatemember/ultimatemember/pull/906)
+			// roles e.g. "潜水艦subs" with both latin + not-UTB-8 symbols had invalid role ID
+			$id = sanitize_title( $_GET['id'] );
 
 			$pre_role_meta = get_option( "um_role_{$id}_meta", array() );
 			if ( isset( $pre_role_meta['name'] ) ) {