Writing Flow: Pressing enter while within inline boundary forces caret position to revert

[aduth]

To Reproduce

1. Navigate to Posts > Add New
2. Click writing prompt
3. Press Cmd+B (Ctrl+B) to start bolding text
4. Type a few characters
5. Press Enter
6. Type a few characters
7. Observe caret is forced back into first paragraph unexpectedly

Expected behavior

Typing at Step 6 should occur within the second paragraph.

[aduth]

This appears to be largely an issue caused by lingering TinyMCE DOM state left in the first paragraph which can incur the forced subsequent re-focus (e.g. #_mce_caret, the ZWSP inline boundary character).

@spocke Do you have any recommendations for how we can either reset the TInyMCE DOM state when focus leaves the editor? Or prevent it from incurring future forced focus grabs? I think this might be related to tinymce/tinymce#4472 with the ZWSP placement (trimming the ZWSP on blur fixes the issue). I'll plan to continue debugging this Monday.

[aduth]

WIP PR: #8879

[designsimply]

Possibly related: #8114, #8387

[ellatrix]

This issue seems to be resolved, most likely after #11595. Could you confirm?

[ellatrix]

Seems fixed, because the live DOM is now continuously in sync.