I’ve also experienced the same issue a couple of times recently. Only on a single Pi Room Bridge endpoint but it’s my main one. Linux core, wired ethernet to endpoint. The pi has a HiFi berry Digi+ output to a chord DAC. When the problem struck last and I was testing I was under the impression that the sample rate light on the DAC was lit as if it detected a signal from the Pi. There was nothing audible. Rebooting the endpoint has fixed this for me. Will investigate further and confirm if it strikes again. There’s no errors on the controller, each track looks as though it’s about to play then the progress line shoots to the end of track and the next one starts, before doing the same. Both local tracks and Qboz streaming are affected. Only the single Pi output affected, the other endpoints are Chromecasts and another Pi with Hifiberry DAC.