It's not that often, but sometimes, when in-game, most of my buttons and the touch screen will randomly stop responding. In these cases, the PS button and the Off button still work (possibly volume too?), and once I return to the Vita's home/app area via the ps button, everything works until i continue the game. Closing the game and relaunching worked. I noticed the FAQ talked about frozen screens which is largely my issue, though I don't think it's the same since the home area still works, and im able to "solve" it by simply closing the app instead of having to shut off the vita//hold the power button. What can cause this, and is there no other solution than to close the app?