I had the same issue: Oh dear, no track artist and I agree with @anon94274355. Putting VA in the album artist tag seems unnecessary.
In iTunes it displays ‘various artist’ under the titles through checking the option ‘Album is a compilation of songs by various artists’; so there is no need to have the text ‘Various Artists’ in the Album artist tag. See image:
Could Roon manage the issue @anon94274355 and I have through some check-box saying: “Album is a compilation of songs by various artists”?
