Albums Imported From Local Files Randomly Getting Removed From Favorites

I import music from local files a lot, and I like to filter my albums by favourites, as it makes it a lot easier to find certain albums. The issue is, with a lot of the albums I import via local files, after around a day of having the albums favourited, they get removed from my favourites. Since I sort my albums by favourites, if I forget to re-favourite the album, it eventually gets drowned out by all the other music I add to my library and I forget about an album I love. This is a problem on all devices, and has also occurred for one album that wasn't imported via local files. It has been going on for years now. Fix your app.