Visual glitching on rollovers
So I have a play and a pause button set up with states and advanced actions (to toggle between play and pause). By default both buttons are at 75% opacity. On rollover it changes to 100% opacity, and on click it turns a different color (also at 100% opacity). But when I preview in HTML5 (at least in Microsoft Edge), I sporadically get a flashing white box during the state changes. The buttons used are SVGs with a transparent background. Any ideas?

I also tested this in the Mac version of Captivate and previewing in Firefox. In that case I don't get the flashing white box artifact, but the button does tend to disappear for a split second when transitioning between normal and hover states.
