This seems particularly problematic for Various Artists releases, e.g. compare
https://critiquebrainz.org/release-group/d7357b29-ac7e-3149-b141-e40d8fe27753
https://musicbrainz.org/release-group/d7357b29-ac7e-3149-b141-e40d8fe27753

It also happens for single artist releases, e.g. tracks 2 and 16 on the first disc here:
https://critiquebrainz.org/release-group/08b1b66b-8c58-3ecf-89d4-1efd5772b618
https://musicbrainz.org/release/a3b7bcb4-ec86-4682-84d0-dca37aef1823

It could show track artists only if they're different from the release artist... luks had something somewhere which did that, showing them below the track name, but I don't know where that is.