[IME][Chrome] Using bold after opening macOS accent panel and choosing accent throws an error

[f1ames]

Is this a bug report or feature request? (choose one)

🐞 Bug report

💻 Version of CKEditor

CKEditor 5 (v10.0.1)

📋 Steps to reproduce

Extracted from ckeditor/ckeditor5-engine#861 (see ckeditor/ckeditor5-engine#861 (comment)).

1. Go to https://ckeditor5.github.io.
2. Use simple content like <p>Foo Bar</p>.
3. Place selection inside editor and long-press a (so the macOS accent panel is opened).
4. Click Bold button on a toolbar (Ctrl + b doesn't work here).
5. Choose accent from accent panel.

✅ Expected result

Bolded accent is inserted, no error thrown.

❎ Actual result

Bolded accent is inserted, error is thrown.

📃 Other details that might be useful

Happens only in Chrome (66.0.3359.181 (Official Build) (64-bit)). On Safari and Firefox clicking Bold button closes accent panel.

[FilipTokarski]

I just checked it with Chrome 80.0.3987.132 on demo page and manual article test on latest master. This issue still occurs but with a slight difference - expected result works fine, you can insert a bolded accent character. But when you then click Bold on the toolbar to turn it off, the error is thrown:

ckeditorerror.js:66 Uncaught CKEditorError: view-renderer-filler-was-lost: The inline filler node was lost. Read more: https://ckeditor.com/docs/ckeditor5/latest/framework/guides/support/error-codes.html#error-view-renderer-filler-was-lost

    at Renderer._removeInlineFiller (http://localhost:8125/ckeditor5/tests/manual/article.js:77853:10)
    at Renderer.render (http://localhost:8125/ckeditor5/tests/manual/article.js:77646:9)
    at View._render (http://localhost:8125/ckeditor5/tests/manual/article.js:82119:18)
    at View.<anonymous> (http://localhost:8125/ckeditor5/tests/manual/article.js:81624:9)
    at View.fire (http://localhost:8125/ckeditor5/tests/manual/article.js:115595:30)
    at View.change (http://localhost:8125/ckeditor5/tests/manual/article.js:81916:10)
    at View._disableRendering (http://localhost:8125/ckeditor5/tests/manual/article.js:82106:9)
    at Model.EditingController.listenTo.priority (http://localhost:8125/ckeditor5/tests/manual/article.js:40512:14)
    at Model.fire (http://localhost:8125/ckeditor5/tests/manual/article.js:115595:30)
    at Model._runPendingChanges (http://localhost:8125/ckeditor5/tests/manual/article.js:52544:8)

[LukaszGudel]

It is possible to also get this error in other browsers (Safari and Firefox), but default UI behavior is not allowing this. Hacky steps to reproduce in other browsers:

1. Use console to execute: setTimeout(() => editor.commands.execute('bold',true),4000)
2. Place caret inside the editor
3. Hold a to open accent window and then wait for Bold button to activate
4. Choose any character
5. Click Bold button in the toolbar

[CKEditorBot]

There has been no activity on this issue for the past year. We've marked it as stale and will close it in 30 days. We understand it may be relevant, so if you're interested in the solution, leave a comment or reaction under this issue.

[CKEditorBot]

We've closed your issue due to inactivity over the last year. We understand that the issue may still be relevant. If so, feel free to open a new one (and link this issue to it).