https://chatlogs.metabrainz.org/brainzbot/metabrainz/msg/4533967/
"Old" account is "chaban". Recently registered a new one with the same email address for testing purposes. "New" name is "nabach" (Lost that account due to MBS-10787)
As soon as I refreshed my Discourse tab my name got changed and the old profile link stopped working.
The name change happened on-the-fly while still logged in.