I've got a 2018 Chevy Impala and since updating to iOS13.1, my iPhone XS Max disconnects every couple minutes. Music still plays, and my Phone Screen still shows the turn-by-turn navigation like it was still connected.. Not seeing any software updates for the radio, but I'd assume it's another bug related to iOS13.1.. What makes it hard is reporting issues potentially related to the radio, not the iOS release. I've filed bugs before and have been told to contact my Car Manufacturer LOL... Like, ok? They're going to listen to little old me lol