Date & Time: 31/08/2019, S:1:09am
Frequency: All the time
World name: Odin
Character name: Jaffa Archfiend

Figured to put this into here since it does seem to be a bug. I've completed The Rising Seasonal Event for 2019, and enjoyed the cinematic and wanted to watch it again. However, when I looked in the Seasonal Events section of The Unending Journey, it is not there.

Nothing is in there. None of the Seasonal Events for 2019's cinematics are in The Unending Journey...