Explanation on Error Indication mechanism

So how does the Error mechanism in bubble work?

I have a form with input fields and drop down menues, all of them are marked “should not be empty”, but when the user clicks the save button while leaving those fields blank, only one dropdown becomes red to indicate an error.

Whats the deal? i want all fields and drop downs to indicate red when left blank

Can you share a link to the editor so we can see what’s going on?