I was trying to make sense of different tables included in the database dumps and replication feed. ianmcorvidae updated the list of tables on wiki and I split them up by which tables are included in which dumps (results here: https://wiki.musicbrainz.org/Replication)
It seems that a table, release_tag, which is part of the mbdump-derived.tar.bz2 dump, is not included in replication (all other derived data is included). It seems pretty arbitrary to include all other tag tables except this one, so I guess this must be a mistake?
Could you please include them after the next schema migration - or earlier if possible?