Double click on one word span produces buggy selection

[engineering-this]

Type of report

Feature

Provide detailed reproduction steps (if any)

1. Once t/2813 ( Fix for: editor.insertHtml and editor.insertElement pollutes editable with empty spans #2987) is merged open manual test tests/core/editable/manual/insert
2. Place collapsed selection in the middle of one spans Foo ^bar.
3. Press insert element.
4. Double click on created bar span.
5. Press insert element

Expected result

Span containing word bar is completely removed.

Actual result

Span is preserved only it's text is removed.

Other details

This is an upstream browser issue, so it is labeled as a feature to provide a workaround. To fix this we should introduce logic to optimize selection, which would also fix #3118.

• Browser: Firefox
• OS: macOS
• CKEditor version: development of 4.12.0
• Installed CKEditor plugins: …

[f1ames]

As mentioned in #2987 (review) it also happens in IE11 (other IEs should be also checked when working on the bug fix).

[f1ames]

Extracted from #2987 - there is a wider issue, similar also to #3118. It is caused as @engineering-this mentioned by specific selection which begins on the current node but ends on the beginning of the next one (which is not visible). On IE11 it occurs also with mouse selection:

And also in any other browser similarly:

I think we need proper Umbrella ticket for this issue, I will create it later.