Spelling Correction Not Persisting at Start/End of Comment

[arkflpc]

When correcting a spelling or grammar mistake at the beginning or end of a comment, the update does not persist in the comment text. However, corrections made within the body of the comment are reflected properly.

📝 Provide detailed reproduction steps (if any)

1. Type a comment in CKEditor 5 containing a spelling or grammar mistake at the start or end.
2. Use a spellchecker (such as WebSpellChecker) to correct the mistake.
3. Observe that the correction does not persist in the comment text.

✔️ Expected result

Spelling corrections should be consistently applied and persist, regardless of their position in the comment.

❌ Actual result

Corrections at the start or end of a comment are not saved, while corrections in the middle of the comment work as expected.

📃 Other details

See #7816.

• Browser: …
• OS: …
• First affected CKEditor version: …
• Installed CKEditor plugins: …

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