Same problem. Just updated: rAudio 1 • 20210416 5.10.25-4-ARCH armv7l Raspberry Pi 4 Model B Rev 1.1 BCM2711 • 3.8GiB 4 x Cortex-A72 @ 1.5GHz No albums are shown, everything else is OK, Artists, Genre, ...
The version from end of last year didn't have this problem.
The following worked for me when I did a fresh install this week. Press settings gear icon, next to Library press rotating arrows icon, choose rebuild entire database. This will take some time depending on the size of your collection but it's a one time thing.
There is a toggle for "update library on mount" when a new share is created. Next time I do so I plan to turn it off since I will need to do a rebuild after the automatic update. Then maybe only one pass of the data will be needed. 21k tracks takes 3.5 hours over wifi.