[IME][Chrome][Safari] Composition before space doesn't work in inline style surroundings in some cases

[f1ames]

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

🐞 Bug report

💻 Version of CKEditor

v10.0.1

📋 Steps to reproduce

1. Switch to Spanish keyboard.
2. Go to https://ckeditor5.github.io.
3. Set editor content to <p><strong>Foo </strong><i>Bar </i>Baz</p>.
4. Put selection on the end of an inline element, but before space, e.g. <p><strong>Foo{} </strong><i>Bar </i>Baz</p>.
5. Press ´ (Spanish accent composition).
6. Press a.

✅ Expected result

The á character is composed.

❎ Actual result

The ´á sequence is created.

📃 Other details that might be useful

Tested on Chrome 67.0.3396.87.

[Mgsy]

This issue doesn't occur on Windows. I can reproduce it on OS X.

[LukaszGudel]

This issue occurs if the following space is also part of the inline element (bold or italic). If the following space is not bolded then the composition is working correctly.

[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).