1. Edit a release
2. On Tracklist tab, change a track's track artist to e.g. ORIGINAL_TRACK_ARTIST feat. NEW_ARTIST
3. On Recordings tab, check "Also update the recording with track changes" for that track
4. On Edit Note tab, the Edit Recording shown does not list NEW_ARTIST, just "ORIGINAL_TRACK_ARTIST feat. "
5. Edits are applied correctly.
I noticed this when editing http://musicbrainz.org/release/42de1934-589f-4fff-a40e-5dfb8130648f . Screenshot of two of the Edit Recordings shown is attached.