Empty editable regions created with Restricted Editing inside of a table get dropped when reloading the editor's data

[mabryl]

📝 Provide detailed reproduction steps (if any)

1. In a table, create an editable region that will contain just empty spaces
2. Execute editor.setData( editor.getData() )

✔️ Expected result

The previously created editable region should be retained in the table after reloading the data.

❌ Actual result

The empty editable region will get dropped. Notice that it doesn't affect paragraphs with empty editable regions or regions inside of the table that have some content:

Screen.Recording.2024-05-17.at.15.12.07.mov

📃 Other details

• Browser: cross-browser
• OS: cross-OS
• First affected CKEditor version: N/A
• Installed CKEditor plugins: Table, RestrictedEditingMode

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[Witoso]

@mabryl do you know if this is a regression? We changed a few things in recent versions in the restricted editing.

[mabryl]

@Witoso looks like it's not a regression. I just retested this and I went back all the way to v35.2.1 and the issue is still reproducible in that version.