Steps to reproduce:
Ingest a video on http://localhost:8080/admin/upload.html and assign it a series.
Check dublincore.xml of episode.
On http://localhost:8080/admin/recordings.html?state=finished click the cog in the state column, then choose the "Mediapackage" tab, open "dublincore/episode" and click the link to download the dublin core catalog.
The <dcterms:isPartOf> property is missing.
There should be a <dcterms:isPartOf> property in the dublincore.xml.