Very similar to this issue, except that on my iphone the “You haven’t added any music yet!” prompt is consistent. I have plenty of new music added every day.
I’m running Roon ROCK Version 1.7 (build 555) stable on an intel
NUC8i7BEH 8GB RAM128GB M.2 SSD. All the music is stored on a local hard drive.
The iphone is an iphone 8 plus, running the latest version of ROON.