Trigger not working when published

I have also lost trigger and variable functionality for buttons within a Q&A scenario that (are supposed to) become hidden if the slide they link to has already been visited. Literally worked one day, didn't the next.

While I appreciate Wendy's solution to Shevi's problem this is more of a work around than a solution. Doing this in a case with multiple buttons is time consuming. And what if the triggers for those "overlay" boxes stop working?

Scenarios are an E-Learning norm and immersive ones can have many variables/triggers, having these features just "stop working" is simply not acceptable.