I haven't seen this reported, so here goes. 2018 GTI Autobahn. JB4 with BT, 8.5.1 revision.
Whenever I have JB4 Mobile connnected (Samsung Galaxy S9) with the gauges up, and the auto lights switch on or off from the DRL's, it crashes the JB4 Mobile app. Just knocks it right out. Restarting the app works until the next headlight switch, when it crashes again. This is during the daylight hours when switching from DRL's to lights on and vice versa. It does not do this when switching beams from low/high or high/low at night.
I've had no response from support so far. Has anyone else seen this behavior?