Green Hover state for condensed text in button

Hi.  I have a drag-and-drop quiz interaction with a set of 5 buttons to be dragged.  The label/answer for the last item was a bit too long for the button, so I condensed the text by .6 pts.  Now, when I preview the slide and roll over that button, the text turns green and stays that way while it is being dragged, and turns a green-brown in the target area.  There is no hover state defined in the States setting.  

I tried testing that it was caused by the condensing by similarly condensing the 4th button, which started doing the same thing. But when I removed the condensing from the 4th button, the green hover issue remained.  I tried using format painter to match it to the format of another, unaffected button, but that didn't fix it. I also tried shutting down Storyline 360 and restarting it.

Does anyone have any ideas why this is happening?  I am attaching the slide.