Situation: I add a new release, artist A.
Track artists are A (first three tracks), B and C (next few tracks).
After submitting this release, I go back and replace the release's artist A with "various".
The editor, without asking me, also replaces the first three tracks' artist with "various".
This is clearly not what I intended.
(a) ask before doing that, as it's tedious work to undo.
(b) never replace a track author with "various" (or "unknown" for that matter).