I noticed my NT with CM11 nightly installed(http://xdaforums.com/showthread.php?t=2560827) becomes very unstable when battery drops below 50%. For example, menu pops up by itself, apps launch by themselves, screen changes by itself, and you name it. It is like it has its own mind! But once I plug in the charger, then everything goes back to normal. Anyone else has this issue or is it just me?