I own two Roadlocks and both require the key to rotate 180 degrees , before the locking pin retracts . As this happens , the key rotates further, beyond 180 degrees .
Just maybe , it’s an anti lock picking feature

My only gripes , which I can live with are ;
1) Very usual to struggle pulling the disk pin out ( wiggling the handlebars helps but often need to move the bike . ) This is disk gripping and I’ll guess not fixable.
2) Often need to push a bike a fair way , before the disk pin engages . ( more a feature of red bike versus GSA ). The result , is that you find the front wheel outside the parking bay lines .
Hey it doesn’t bother me as long as my bike is still there when I return .