"Release Accepted" for Season Pack, but not being grabbed

Sonarr version (exact version): 3.0.3.653
Mono version (if Sonarr is not running on Windows): n/a
OS: Windows 10
Debug logs: https://drive.google.com/drive/folders/1kyi9RhuGKWKWldRsAU1qVsCYQiU9ogVk?usp=sharing

(Make sure debug logging is enabled in settings and post the full log to hastebin/pastebin/dropbox/google drive or something similar, do not post them directly here. Post in .txt not .doc, .rtf or some other formatted document)

Description of issue:
Doing a manual search for a season. The search finds a suitable season pack and records it as “Release Accepted” in the trace log, but the release is not passed to the download client.

In the Sonarr.txt log, there is a corresponding error log:
[v3.0.3.653] System.NullReferenceException: Object reference not set to an instance of an object.

For this particular series I do already have some of the episodes downloaded already, but thy are all a lower quality than the sesaon pack and are upgradeable. The trace logs confirm this

Is this a bug?

We’re going to need more of the trace log (or at least the related debug log).

Release accepted is part of the puzzle, but the release isn’t grabbed until all releases are processed.

The other log shows it failing in an Interactive Search, but fails to process all the results because something that is expected is missing.

I have uploaded the full logs to the same location

What type of search are you doing?

The end of the logs appear to show it being an interactive search (which wouldn’t grab anything on it’s own), but you were also running into a bug that has since been fixed (where results would not be displayed and it would say no results were found).

Are you still seeing this with 3.0.3.654 or later?