I've restarted several times now. I thought the Pi was OK but I had been using a personalised version. With the official version I get the "undefined" there also.
Everything looks ok. I had a look in profiles.db and the clients can all connect. I'll have a look in the code to see if there's anything that sticks out
RPi3 Ubuntu Server 20.04, Windows 10 AMD64, AAEON UP Core Ubuntu Desktop 20.04
Avalon M-Uno, EQ6 Pro, Atik420, ASI1600MM-C, ASI120MM-S, DBK21AU04, ZWO EFW, Optec TCFSi
Vixen R150S, GSO RC8, ST80