CKEditor5: "contextualballoon-remove-view-not-exist" error when inserting multiple images via URL in core image plugin

I can't reproduce this on the 11.x branch. Possibly steps 7 and 8 need refinement.

Just adding the steps

1. Type any text into the body field. (e.g., “Test paragraph”)
2. Use the Insert image via URL button to insert an image → works fine.
3. Use the Insert image via URL button to insert a second image → works fine but shows error in console
   

   Uncaught CKEditorError: contextualballoon-remove-view-not-exist

4. Use the Insert image via URL button to insert a third image. → Nothing will happen, but you will see another error in the console
   

   Uncaught CKEditorError: collection-remove-404

That is what I did but there were not errors.

Ah, Ok Thanks for checking.

I retested, and I am still able to reproduce it with the same step in another fresh installation.

The behaviour occurs in Chrome (Version 139.0.7258.67) and Edge (Version 139.0.3405.86), but I could not reproduce it in Firefox (141.0.3)

@abhijeetsatpute, can you confirm this happens on 11.x ?

In Drupal core changes are made on on 11.x (our main development branch) first, and are then back ported as needed according to the Core change policies → . Also mentioned on the version → section of the list of issue fields documentation. Thanks.

Yes, I can confirm this issue happens on the latest 11.x development branch as well.
Behaviour pattern:

• If I insert images without adding any text, I can insert multiple images without issue.
• If I add text above and then insert images, only two images can be inserted successfully.
• After saving the content, if I edit again and try to insert images, the same limitation occurs — only two images can be inserted.