Collection artwork not downloading - 4.9.3.0 / 4.10.0.11 Beta

[leshkraven 2]

Environment:

• Emby Server 4.10.0.11 Beta (also reproduced on 4.9.3.0 stable)
• Debian Linux (Debian 12)
• Was working correctly on 4.8.11.0

Since upgrading from 4.8.11.0 to 4.9.3.0, collection artwork no longer downloads automatically. Collections are created correctly with the right TMDb IDs, the metadata folder contains the correct nfo files with tmdbid tags, but no images are ever downloaded
 

What I've tried:

• Refresh metadata with Replace All Images ticked,  no images downloaded
• Deleted and recreated collections, no change
• Cleared tmdb-collections cache, no change
• Confirmed server can reach image.tmdb.org (curl returns 200)
• Confirmed TMDb API returns correct poster/backdrop paths for the collection IDs
• Manually placed poster.jpg and fanart.jpg in metadata/collections folders,  Emby ignores them and still shows blank folder icon
• Ran Scan Metadata Folder scheduled task,  no change

Additional info: Collection identify via the UI returns no results for any search query including well known collections like "Avatar", "Predator", "Dragon Ball Z". The RemoteSearch/BoxSet endpoint returns 200 in under 100ms suggesting it's not actually querying TMDb.

This appears to affect clean/migrated installs as noted in older threads. Existing installs that were working before 4.9 continue to work but any new collections added after upgrading have no artwork.