Having some weird issues with mine now, the last 2-3 days I've been playing a lot with valves open and closed playing with my new tune, and all 3 days the ESC button stopped being able to control the valves after about 20-30 minutes of driving. Changing drive modes also didn't open or close valves when it fails, but its back to normal after turning the car off a while and restarting. Weirdly, stop/start memory has remained working fine, but I did have it happen to me the same as other here described right after I got my tune, and had been cycling though drive modes a lot that it didn't remember the setting on start up. Maybe cycling drive modes throws the controller off?
Seems to be ok most of the time, but is quirky. I notice ASR valve controllers now lists OPF cars separately with theirs, so maybe there is something about the OPF cars canbus that is different? I think I'm right in saying everyone that's mentioned an issue is a newer car?
I think I may to remove mine and just use Audi drive modes. It was great on a stock car, but I don't feel the need beyond the drive modes anymore with a decatted stage 2 tune to have manual control of the flaps, and will, I think, get a stop/start harness to kill that annoyance as I see there's some on Aliexpress for around £25. I tried disabling start/stop with OBDEleven Pro (voltage set to 12.1), and apparently that doesn't work on new Audi's either...