In my music collection I have albums that start with "..." For example, the Britney Spears album "...Baby One More Time" or the Phil Collins album "...Hits" Recently I've noticed that those albums no longer appear in Emby. I have tried removing the three dots at the beginning of the folder name and then Emby sees the folder again. I know it has not always been like this but I also don't know when it first began. My guess it was with the 188.8.131.52 release but I can't say for sure.
My folder structure is Music>Album Artist>Album
I am currently running Emby 184.108.40.206