I have had this happen several times and wonder if anyone has had it happen, or knows anything more about it.
It happens at night when on charge.. I will plug it in and go to sleep.. 4 times now including last night I have woken up and the phone has been almost too hot to touch.. the temp shows 150 or so and obviously really hot.. I have to unplug and remove the battery to get it to turn off. Obviously this is not a good thing to happen..