All combo boxes in our app stopped working all of a sudden. The live version of the app is working fine, but the combo boxes have stopped working in edit mode/preview mode. The choices in the combo box are populated from a collection and there's no issue with that part. The problem occurs when a user tries to choose an option from the combo box. The OnChange property doesn't trigger for some reason and the users are unable to make a selection.
All combo boxes in the app have failed in the same fashion. I tried creating a new Combo box with sample data, but in vain.
Looks like this is a recurring issue as I experienced the same issue recently and experiencing another similar now. The only cure that I found is to recreate all complex fields which is very annoying if there are a lot of them and the form is complex.