The \Drupal\quickedit\Plugin\Filter\QuickEditMediaEmbed class extends \Drupal\media\Plugin\Filter\MediaEmbed. The parent class has full annotations, but the extension doesn't. There is no "type" specified nor inherited, which potentially leads to errors like:
Warning: Undefined array key "type" in Drupal\filter\Plugin\FilterBase->getType()
Add type = Drupal\filter\Plugin\FilterInterface::TYPE_TRANSFORM_REVERSIBLE to the annotation.
Closed: won't fix
1.0
Code
Actually, this issue needs to be fixed in the patch supplied by
https://www.drupal.org/project/quickedit/issues/3101267#comment-14708359
🐛
Quick Edit could not associate the rendered entity field markup
Needs work
closing.