Although LB reasonably prefers albums over EPs, it should prefer an official EP over a bootleg album.

Example: This recording and other tracks from the same EP always get mapped to an album RG which only contains these tracks on a Russian bootleg...

The funny thing in this case is that the issue only happens if the listen is submitted with recording MBID (but no release MBID), the automatic mapping would get this right: https://labs.api.listenbrainz.org/explain-mbid-mapping?artist_credit_name=Billie+Eilish&recording_name=COPYCAT&release_name=dont+smile+at+me