@MrDenis I’ve consulted with the rest of the team and what’s happening is that there are some albums attributed to various artists in your library. The analyzer is having trouble identifying these tracks. Because of this Roon is also creating new album objects for each subfolder in various artists. We also noticed there is a lot of scanning happening in your Roon library, you can turn off background and on-demand audio analysis in Roon Settings → Library to prevent additional background activity from occurring.
As a longer-term fix you can change up your file structure. This is discussed here Is ROON able to run a library of 1,000,000 tracks? - #5.
We are currently investigating other reports of this here Build 1392 through 1401: Album Covers Missing, Orphaned Tracks from Compilation Albums [Roon Investigating]. Any updates will be posted there.