Volumio Library issue

Dear all, I have a problem concerning the library. I’m using Volumio on a Raspberry Pi3 connected to my DAC (Audiolab M-DAC) via USB. The storage is managed by an external USB HD connected to the raspberry through USB.
It worked perfectly for a couple of days, but yesterday it begun to give me a lot af problem with the library.
It seems it’s not scanning the whole library but just a small part of it. I’ve tried a lot of things: restoring Volumio, reinstalling Volumio, formatted the HD, copied again all the music (90 gb)…but nothing is working.

Is there any one able to help me to solve this problem? Thanks!

Update 03/26/20

Looking at the various web pages it looks as a serious problem of Volumio, it seems has no solution at the moment…

Inviato dal mio EML-L29 utilizzando Tapatalk