Spotify deleting Local Files Sources on Windows

[SylpheeDashstep]

I'm currently listening on the Windows 10 version of Spotify, I have a premium plan and I've been listening for a while. Yesterday I wanted to listen to my local files but found out that most of them were grayed out for some reason. Turns out that the source had been deleted for some reason. Okay, I guess? I put the source back in and waited for Spotify to reload the 500 songs I had locally. This morning the same exact thing had happened! I loaded it up and most of my local files were just gone, and the problem was the source once again. Can anyone help me figure out why this is happening and if it's going to continue being a problem?