Dropping image on nested editable (image2 caption) doesn't effect.

[Artur Delura]

1. Open: ​http://tests.ckeditor.dev:1030/tests/plugins/uploadwidget/manual/image2
2. Add some image into editor.
3. Enable image caption.
4. Drop another one into image caption.

Effect: Image uploading notification is visible, but nothing changes in the editor content.

[Jakub Ś]

When trying this for the first time I had an impression that editor was there for a brief moment and then disappeared.

Perhaps ACF removes it? If that is the case then perhaps the question is if ACF can and should block upload?

[Artur Delura]

This ​line might be helpfull.