2015 SVR, 88k miles, fabulous car. First fault:

The alarm has started to go off after a period. The display notes "Passenger door unlocked".

This can happen after a few minutes of being parked. Or a few hours.

Noticed too that when I drive off and the doors lock @ 5 mph, after about 30 minutes they unlock, whilst driving. If I lock them again, they will often unlock again after a random period.

My thoughts are it is a faulty door lock module (if there is such a thing) and this doesn't catch right, or overheats, or something.

Car has extended warranty so phoned the dealership. Soonest they can book it in is the middle of August.

Any thoughts and advice great appreciated.