Normally by default recordings are sorted by date in an ascending order. Recordings without any date are displayed at the bottom.
For the referenced work some recordings with available date are displayed after recordings without the date. On the first glance it looks like incorrect sort order is applied for recordings which are linked to more than 1 work.
My original message on MusicBrainz forum describing the error: https://community.metabrainz.org/t/sort-columns/388528/7