Roon won’t play playlists or “add to queue”

I have a QNAP TVS-1282 T3 and I’m running Roon.

I have TIDAL and a couple thousand albums in my library that were originally ripped To lossless in iTunes Along with a random assortment of MP3s .

I am having an issue where I can pick a song and an artist and play it… Or a full album from my library and it will play… But if we pick a playlist there is no audio. Roon will show that the song is playing - but there is no audio until I reboot the Roon server on the NAS.

Two days ago I was playing a song and my daughter did a search for a song to try to add it to the queue - and the same thing happened.

Does anyone have any idea what is going on - and how to fix it?