Tab order not behaving correctly in Storyline 360
I'm working in articulate 360 storyline. We have "correct" and "incorrect" slide layers, each composed of a heading (e.g., Correct!), a textbox with info (e.g., that was a great answer!), and a button (e.g., Continue). When tabbing through, the player is going textbox, button, PLAYER CONTROLS, and then to the heading (i.e. Correct!).
The tab order is correctly set to go Heading, textbox, button...but it doesn't seem to be functioning that way.
I can't figure out what is going on. Any suggestions?