Clicking between two adjacent inline formatting regions results in error

[hejinhua]

📝 Provide detailed reproduction steps (if any)

1. use ClassicEditor
2. Click Bold first, then enter the content
3. Click the Italic, then enter the content
4. Click on the junctions of two formats, console err: view-renderer-filler-was-lost

✔️ Expected result

Don't report wrong，can continue editing

❌ Actual result

After the input, the console has been reported.

📃 Other details

This error can also be reproduced by editing the demo on the official website

[FilipTokarski]

Hi, I was not able to reproduce this error. Could you provide a screencast to show exactly how to reproduce it? And also what is the editor version that you use?

[hejinhua]

2022-03-16.16.40.07.mov

[FilipTokarski]

Thanks! I can reproduce it now as well. Looks like it was introduced in version 31.0.0.

This happens between two adjacent inline formatting regions and can be reproduced with other plugins also.

Uncaught CKEditorError: view-renderer-filler-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 (renderer.js:445:1)
    at Renderer.render (renderer.js:217:1)
    at Renderer.<anonymous> (renderer.js:128:1)
    at Renderer.fire (emittermixin.js:199:1)
    at Renderer.set [as isSelecting] (observablemixin.js:95:1)
    at updateBoundObservableProperty (observablemixin.js:663:1)
    at observablemixin.js:690:1
    at Set.forEach (<anonymous>)
    at Object.<anonymous> (observablemixin.js:689:1)
    at Object.fire (emittermixin.js:199:1)

[hubertperron]

This is still present in CKEditor v34 but doesn't seem to break any functionality besides filling our error monitoring with tons of exceptions ;)