Next button doesn't seem to work on a question page with an extra layer.

Weird. I thought it might be a bug from a previous version, but I've got the latest update, and it still happens. I tried adding a "jump to next slide when user clicks Next" trigger, but it still reloads the same slide. And I don't see any other triggers that would cause that.

So I'd say this is what is politely called "unexpected behavior." I suggest you submit a case directly to the Articulate staff. You can do that here: https://access.articulate.com/support/contact