Uncaught exception on trying to drag a None item in designer

Are you requesting a feature, reporting a bug or ask a question?

Reporting a bug

What is the current behavior?

If you add a radio group question in creator, then add the "None" option then click there the drag and drop icon would normally be this creates an uncaught exception.

What is the expected behavior?

There is no exception.

How would you reproduce the current behavior (if this is a bug)?

Explained above

Provide the test code and the tested page URL (if applicable)

Tested page URL:
The demos on the product website have this issue.

Specify your

• browser:
• Reproduced in recent chrome and brave.
• editor version:
  1.9.74 and whatever is live on the website for demos.