Button Disappears When Revisiting Slide

I found another post that suggested removing any triggers you've assigned for Hover and Visited states.  I guess those states are triggered automatically (Storyline knows to trigger them if you give the states those default names).  For some reason, (a bug I guess?) if you add a trigger for Visited it will make the object disappear.  Removing my assigned triggers seemed to fix the problem for me, and the button (which is actually a shape made into a button) still changes states as expected.