Visited today and successfully charged on connector 6.
I first tried connector 7 but it just didn't seem to work. The app continuously said the charging port was not locked no matter what I tried. When I switched to 6 I got the same message for a few seconds but then the charge started.
The chargers now have the red design with the new QR codes for payment. The numbering has been "fixed" from before where the numbers were not in sequence. With the merge of the payment platforms the numbers for AC now start at 5 on the left, then 6,7,8 to the right (1 through 4 being the fast chargers outside the parking).
Parking P1 was more than full, with people parked in many unmarked spots. 2 of the 4 charging spaces were ICEd. One car was charging. Someone was plugged into the fourth stall but not charging. It's impossible to tell for sure if they finished charging or never started a charge. The first customer back was the car that was really charging and I was able to move by car from parking P2 back to P1 before the spot got ICEd again. Later some of the ICE customers left but the chargers immediately got ICEd some more...
I reported the problem to the information point, they said they would report it. Not sure what they are going to do, hopefully they can send some sort of warning to the infringing cars. They are probably not going to tow the cars out... But one can hope.
It wouldn't have helped much with the parking already full, but it's a downside that you cannot reach other regular parking spots with a cable if the official charging spot is somehow blocked.