Qobuz

No problem here, either.

Had some issues the week before last with Roon being extraordinarily slow.  Qobuz is my only streaming service, so it could have been the cause.

The problem went away on its own about 4 days later.

I subscribe to both Tidal and Qobuz. Every once in a in a while, I have to reboot my Roon server in order to get my Qobuz playlists back. I think the Qobuz suffers from slow processing as well, from time to time

That happened to me while I was auditioning Quboz. Fortunately I had all my playlists saved in Amazon Music and was able to retransfer them. Quboz responded to my inquiry and said they could not restore them, and transferring was the only choice. Good luck.

Never happened to me with my Qobuz playlists, however some of my favorite albums became unavailable, some of them permanently, some I had to delete due to unable to access and then save them again. Same issue happened even to some individual tracks too.