You was right. The outer layer of the screen protector was too much and also holding in some heat.
I peeled it off and could immediately feel the temperature of the metal body, that it was blocking thru that one outer layer.
So I would not recommend any layers thicker than one screen protector.
Sometime it not downloaded so you click and it says some error.
I had this issue until I reset my unit after updating, but you should try restarting to see.
Also need wifi connection for it to download once selected.