To people claiming this is not a bug or a problem with the game itself, shut up. You're all wrong.
I'm experiencing this exact problem on a brand new Galaxy Nexus I am developing for. The problem does not manifest on other Android-devices running the same code. On the GN it occurs like clock-work, even when I'm not playing any games. Locking/unlocking the screen solves it temporarily but the touch screen dies after only a few minutes again. If this was my phone I would had returned it already.
I hate to say it, but this thing is junk.