Mine also and rapidly hang or auto restart in stock especially using chrome and with HD widget on.
Now running CM10.1 without chrome and no HD widget, everything seems much better, the hang seems not happen anymore and restart was rarely happen. For the moment, I think this was the temporary solution.
Phone: HTC ONE (M8) | | Kernel: Stock | ROM: ViperOneM8 v1.8.0 - 4.4.2 KitKat
Future Phone: ~ nil
Ex. Phone: Nokia 3310, Samsung S500, Nokia 7610, 7270, 7280, SE K750, Nokia N73, LG Viewty KU990, Samsung Pixon, UltraTOUCH, OMNIA II, Nokia 3120 Classic, Google Nexus One, Samsung Galaxy S II, S III, Sony Xperia Z, Z Ultra, Samsung Galaxy Note 3.
Tablet: Sony Xperia Tablet Z | ROM: Stock v10.5.A.0.230 - 4.4.2 KitKat
Future Tablet: Still Finding
Ex. Tablet: Google Nexus 10