#33486 issue bug-fix

Author: Jakub Winkler

app/code/Magento/Eav/Model/Entity/Attribute.php

@@ -356,12 +356,12 @@ public function getBackendTypeByInput($type)
             case 'text':
             case 'gallery':
             case 'media_image':
-            case 'multiselect':
                 $field = 'varchar';
                 break;
 
             case 'image':
             case 'textarea':
+            case 'multiselect':
                 $field = 'text';
                 break;
 

app/code/Magento/Eav/Test/Unit/Model/Entity/AttributeTest.php

@@ -62,7 +62,7 @@ public static function dataGetBackendTypeByInput()
             ['text', 'varchar'],
             ['gallery', 'varchar'],
             ['media_image', 'varchar'],
-            ['multiselect', 'varchar'],
+            ['multiselect', 'text'],
             ['image', 'text'],
             ['textarea', 'text'],
             ['date', 'datetime'],