As
[artist] teacher/pupil [artist] relationship has asymmetrical display, so does
[work] arrangement to/from [work]; but in result edit display, the latter points in wrong direction, f.i. https://musicbrainz.org/edit/136559476 where the just added 1966 arrangement is shown to have its 1951 original as arrangement.

Edit is “automatically applied” but displayed as needing correcting (if not ‘No’ votes); I have not checked what would be the result, nor whether the bug goes in the other direction too ([work:orig] has arrangement [work:arr]), guessing it improbable.