@JMinE-K
It's automatically done when the compilation tag is set, or the album has songs with different artists without album artist.
So you have a few options.:
Correct the tags: Remove compilation tag, check that all songs have the same artist, or set the same album artist.
Right click on the album and select "Don't show in various artists"
Turn off the feature in Settings / Collection / "Use various artists for compilation albums"
