Picard should not submit AcoustID fingerprints linked to MB recordings if there is a significant mismatch in length between the file and the MB recording.

In this case Picard could however still submit the fingerprint, but just with metadata not with linking it to a recording.

See e.g. https://community.metabrainz.org/t/report-showing-acoustids-likely-to-be-bad-link-to-musicbrainz-recordings/551047/106