Sonarr not auto-downloading new episodes

Sonarr version (exact version): 4.0.5.1710
Mono version (if Sonarr is not running on Windows): ?
OS: Ubuntu (LSIO Docker)
Debug logs: Don’t think this is needed for now
Description of issue: I have two Usenet indexers setup through Prowlarr. A new episode in a series was released at 2am, 4 hours ago. An interactive search reveals several episodes with a high quality profile score, i.e. they’re eligible for download but Sonarr does not auto-download them despite the series & episode being set to monitored. Why is this?

Figured it out. RSS Sync was disabled :confused: