Auto play next movie stops after a few have played

This is a very annoying problem. My wife an I sleep with our movies or TV shows playing. After 2 or 3 have played from our play list it stops playing the next show. It will show what’s playing next but never start. Once we restart it does this again after a few shows. We really need this when our grand’s are watching cartoons. Its doing this on Our Sony TV, Vizio TV and tablet also. Anyone have a clue as to what I need to do?

This is the expected behavior. https://support.plex.tv/hc/en-us/articles/202605013-Play-Queue-Post-Play-Screen

Thanks a lot still very annoying when you have play next checked. It should play next forever until you stop it. I just use another DNLA player that does.