[Chrome] Root that has only a block widget inside can't be focused using keyboard navigation

[charlttsie]

📝 Provide detailed reproduction steps (if any)

1. Open multirooteditor.html on Chrome
2. Remove all content from one of the roots and add only a table
3. Focus some other root and then try to use tab to focus the root with the table

✔️ Expected result

Focus should stay in the root

❌ Actual result

Focus jumps back to the previously focused root:

https://github.com/user-attachments/assets/4c69d3d0-cd1f-4d95-8421-89781c892339

📃 Other details

• Browser: Chrome
• OS: MacOS

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