Rouven Schmidt I don't want to force you to do this, but i was curiouse why you choose this as your SSID it is very unusual. I'm sure Patrick will come over and type about it. Also he will ask the Engineers if this should work in general or if it is an Bug.
I have checked with our engineers, unfortunately, I have to confirm that this is a reproducible bug. It should be fixed with one of the very next releases, but as for the moment, I can not provide a workaround.