Wipe without ignition key!?

Moinsen! I just noticed something strange… Bzw.. Had I once, I just thought wrong. The following: My ignition key is in my pocket. Vehicle is open. Just the front window was still full of raindrops. “Miracle” and suddenly the disc is free again. Meaning: it was wiped! Now the question is: normal is not that, right? I drove the car last time with a rain sensor turned on – was like that also last time. However, if you pull off the key it should be off after all, right!? It definitely wiped. I did not have a second key here, so no one can plug it. Key is also not in the car. Wipe levers don’t go either. Is that someone else already happening? Say: Wipe in front move without doing anything…!?