Have the Galaxy S8 and don't bother to do Qi charging in the car any more. The phone will over heat too easily and you will start getting the charge flower beep cycle. Also the USB
You phone should not be overheating in the wireless charged holder unless you are no using the A/c then i can see that happening. Even in the winter it pushed cold air into the slot where the phone is. I also question maybe there is a issue with your phone if its locking up using Android auto as its designed to use that.
Also like the other guy mention waze is now part of google maps on android auto. You do lose some of the features of waze, but they maybe included back in sometime in the futre.