This issue has been present in previous versions as well and I cannot consistently reproduce it unfortunately.
When I switch from my home network to the mobile network with ARC already playing some music sometimes after the current track ends it stops playback claiming the cue is empty and there is nothing to play. Opening the cue view I can see that ARC simply skipped over all remaining tracks in the cue.
I also cannot simply tap on what would have been the next track there. This results in the „unexpectedplaybackerror“ message. I need to navigate to the album or playlist view and play the next song from there.
As said above this only happens to with a network change. Otherwise playback is very stable.