Single Choice - Why the items are greyed out

https://form.jotform.me/73321315961452

dear sir,

why are the options in my 3rd question all greyed out? any idea? tks.

Thank you for contacting us.

The field seems to be fine at the moment.

If the issue still persists, please let us know.

In case you would like to disable the highlight effect: Managing Field Error States and Highlight Effect