Oh, I had not seen this thread and starting another one that is very similar here:
https://discourse.osmc.tv/t/yatse-album-playback-changed-with-rc2
I did not get any replies, so I assumed I was the only one with the problem! The thing is, I am pretty sure the “play next song” part was working fine before upgrade to RC2. @Hmuenz - was this ever working for you?