After days of nagging about the 15.1.1 update I gave in and installed it on our system. After this a prompt to do Trueplay calibration on our Arc+Sub+2*One came up and I started that.
After multiple tries it still fails with a message (roughly translated from Swedish) “one speaker went missing during calibration”. During the calibration I hear all speakers working but noticed a very high pitched noice from one of the back channels right at the end of the calibration.
Support diagnostics: 2108779561