PluginException thrown after updating to 8.x-3.6

The following exception occurs after updating from 8.x-3.4 to 8.x-3.6:

_Drupal\Component\Plugin\Exception\PluginException_: Plugin (field_group_accordion) instance class "Drupal\field_group\Element\Accordion" does not exist. in _Drupal\Component\Plugin\Factory\DefaultFactory::getPluginClass()_ (line _97_ of _/var/www/site/web/core/lib/Drupal/Component/Plugin/Factory/DefaultFactory.php_).

This is occurring for all admin paths in my case.

The cause is some plugin implementations recently had their extending class reverted back, from RenderElementBase to RenderElement in commit df299404

Clearing the cache with drush cache:rebuild fixes the issue however adding an empty hook_update to flush the plugin cache would be more ideal.