Error thrown on accessing special characters dropdown with keyboard

[niegowski]

📝 Provide detailed reproduction steps (if any)

1. http://fake.ckeditor.com:8081/build/docs/ckeditor5/latest/features/special-characters.html
2. press Alt+F10
3. navigate to special characters dropdown
4. press enter or down arrow to open dropdown
5. press down arrow key

✔️ Expected result

Should not throw and probably allow to pick special character with keyboard.

❌ Actual result

snippet.js:4 Uncaught TypeError: this.children.first.focus is not a function
    at s.focus (snippet.js:4)
    at snippet.js:4
    at Object._listener.listenTo.priority (snippet.js:4)
    at Object.fire (snippet.js:4)
    at c.<anonymous> (snippet.js:4)
    at c.fire (snippet.js:4)
    at HTMLDivElement.n (snippet.js:4)

❓ Possible solution

If you have ideas, you can list them here. Otherwise, you can delete this section.

📃 Other details

• Browser: …
• OS: …
• First affected CKEditor version: reproducible since v18
• Installed CKEditor plugins: …

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If you'd like to see this fixed sooner, add a 👍 reaction to this post.

[Reinmar]

Note: The editor still works after this error is thrown.

Plus: This never worked.

Plus: #9037.

[FilipTokarski]

This should be checked after the latest enhancements in focus handling.

[RoopanV]

The same problem with Tables dropdown too.

[mlewand]

I believe this issue should be fixed in the upcoming release, isn't it?

[Mgsy]

I believe this issue should be fixed in the upcoming release, isn't it?

Yes, it's fixed.