Default [Q] Shutdowns when connected to charger

Since 4.4.2 my phone has been shutting down in a seemingly random fashion. Shutdown as it would I it was at a critical battery level with the "Shutting down...." dialog. I've found it to trigger at the moment I connect a charger (AC/USB) to the phone. Any ideas for a fix or should I stick to charging my phone while off and never charge on?
My Sensation is on 4.4.3 shantur's 3.4 CyanogenMod with 3.33 Firmware. Danke


UPDATE: Appears to be "Android System" crashing