I guess you were just out of luck this time. Lufthansa IT is not flawless and while it always detects my SEN very nicely then when my brother is using OZ*G it is sometimes hit and miss. And sometimes they haven't managed to make a proper reload even in check-in counter. I know it must be very bad as without the *G status you can't select the premium seats at OLCI. But as said, usually it works, just sometimes the link is down.