Validation feedback on radio button

I have a page showing an enumeration attribute as radio buttons. When I validate if a radio button is checked in a microflow using the validation feedback microflow activity I would expect the message to be shown on the enumeration attribute. However, I get a pop-up showing the validation feedback. This is not the case for any other fields and even happens in a newly created project. Is there any way to fix this?
1 answers

As I posted here, I think this is a bug. I would recommend filing a support ticket at