I am using JRiver 23.0.65 on a Mac Mini together with JRemote 3.25.
Some more details regarding that. If I select via JRemote a track of another album after the first one is finished, then playing seems to start for some seconds (both on JRemote and MC on the server) but there is on audio. only after a restart of the Media Center on the server audio is back again.
This only happens when I select a new album/track after the last one of the current album is finished. If I switch to a new album/track before the last track of the current album is finished, then it works fine.