If it does it again, take a picture of the screen and get in touch with your seller or here,
Email:
Support@xvapeusa.com
Phone: 9095171100
The unit does not mind getting hot as I have tried to test mine to destruction with multiple back-to-back max temp sessions (and thrown against a brick wall when I tripped once) and the unit still works just fine.
This is pretty rare as the 'Short Circuit' fault has only shown a couple of times that I know of (electronics sometimes just fail) and when they fail it is usually a simple warranty replacement if it happens in the 12-month warranty period from purchase.