This happens to me as well when I navigate in between pages.
So when I leave the myVMK popup to change a song, when I come back the screen is unresponsive until you click somewhere, and the only way, unfortunately, in this case is to take a picture to get it to re-respond.
I don't think this is a bug that is fixable, just a shock wave thing. Happens with fireworks and all other online games.
A way to fix this issue however, would be to make a small dead zone on the game where the camera won't respond, like clicking on your top bar that displays the gas/points