Button - visited state not highlighting when tabbed to

I have buttons, that need to work with JAWS and the tab key yellow highlight.

The button - when published to our LMS, works great with JAWS, however, once the button is in it's visited state, when you tab to it, it does not show the yellow highlight. I know I'm on the button, because JAWS reads the button and when I hit the space bar the correct layer displays. So it is tabbing to the visited state of the button, just not highlighting with the yellow border highlight.

I'm using Storyline 360 version 3.34, JAWS 18 in IE 11.