Oh man, I totally feel you! I had a similar deal after a month of smooth sailing too. So I just went ahead and uninstalled the charger from the app, flipped the circuit breaker, and let it chill unplugged for a bit. After letting it sit, I set it up again as if it were brand new, and it has been...
Man, the myAudi app often leaves much to be desired, often going on strike for no good reason. Most of the time, it’s just the Audi Cloud acting up. Instead of stressing over it, just chill for a bit and wait, it'll sort itself out eventually.