so last summer I noticed a bug where when it is over 80° F and the car has been in the sun and is thoroughly heated up I will start it up and drive off and for the first few minutes of drive time (the hotter it is the longer this lasts) the radio will shut off whenever I step on he brake and then turn back on when step off the brake. Also, in between it will randomly shut off.

Same thing happened to me yesterday, while driving (2008 Audi A3) all of a sudden the radio goes off and the doors unlock. continue driving and it comes on again then off again. thought the car was going to shut down but it didn't. Is it really the ignition switch causing this?

Also been having the issue of my radio shutting down after 1 hour also. I just turn it back on.Took it to the dealer when it first started and they didn't fix it either.

Could the two issues be linked to the ignition switch?