From the artist picture for the Australian composer / sound designer Christopher Larkin I suspect parts of the entry are wrong. It’s probably because allmusic has him merged with the American conductor of the same name (https://www.allmusic.com/artist/mn0002180992)
I think musicbrainz got it right (currently) having three different CLs:
We have traced this issue back to our metadata provider and I have reached out to them and requested they make a change here. I’ll keep you updated once we hear from them.
Update —
Our metadata provider has let us know that they have corrected this. Please give this about a week or two to be reflected within Roon. Once you see the change on your end please mark this post as the solution.