Having very similar problems with m y newly purchased x98 plus 3g (A6C9).
I’ve found that when battery is below 50% with the charger either plugged in or not plugged in…the device will seem to freeze for 2 seconds then crash and reboot in both android or windows.
The device seems to be more stable if the battery is charged closer to 100%. Not sure how to go about fixing this problem.
