Fixing autoselection of plugin breaking

src/Form/FieldInheritanceForm.php

@@ -366,11 +366,9 @@ class FieldInheritanceForm extends EntityForm {
           unset($plugins[$key]);
         }
       }
+
       $default_plugins = ['' => $this->t('- Select -')];
-      if (!empty($plugins)) {
-        $plugins = array_merge($default_plugins, $plugins);
-      }
-      else {
+      if (empty($plugins)) {
         $plugins = $default_plugins;
       }
     }