Interestingly, had my first drives today on 50.3 and enabled the Auto Wipers in the Settings. It was not raining and the Auto 1 and Auto 2 settings dutifully were not moving (i.e. proof that the auto settings were on). I settled on Auto 2 and started my drive.
During the drive, the wipers operated once. It was the moment I came out from a short tunnel/underneath a bridge when darkness turned to light. I did not notice any water dripping on the car, though of course it is not impossible that some did. It was not raining. What also seem plausible is that the change in brightness (I came from shady side of the tunnel to the sunny side) triggered the NN, perhaps together with some dirt on the windshield?, similar to oncoming traffic in your case...