SOLVED: One of my libraries was suddenly emptied out

[nothingveryobvious]

@TheDreadPirate @use7 @bitmap

I figured it out The newly updated Docker v.4.24.0 defaults its file sharing implementation to VirtioFS. I just had to switch it back to gRPC FUSE, restart Docker, then hit scan. All my media is back and playable now!

Thanks so much to everyone for their help. Thank you especially to @bitmap, for all the effort you put into your reply. I really appreciate it and I learned a lot from you, too!