Issue #3351007 by nick@sirclickalot.co.uk, samit.310@gmail.com: Not compatible with CKEditor 5?

src/Plugin/Filter/EmptyParagraphKiller.php

@@ -10,7 +10,7 @@ use Drupal\filter\Plugin\FilterBase;
  *   id = "emptyparagraphkiller",
  *   title = @Translation("Empty Paragraph filter"),
  *   description = @Translation("When entering more than one carriage return, only the first will be honored."),
- *   type = Drupal\filter\Plugin\FilterInterface::TYPE_MARKUP_LANGUAGE,
+ *   type = Drupal\filter\Plugin\FilterInterface::TYPE_TRANSFORM_REVERSIBLE,
  * )
  */
 class EmptyParagraphKiller extends FilterBase {