[Bug]: strange behavior in recommandation

[neotwix]

Bug Description

I Didn't have any movie recommandation. and all the user has the same tv recommandation. But didn"t the same tv show.

Steps to Reproduce

some logs:
[2026-02-03 17:41:58.114 +01:00] [INF] [104] Jellyfin.Plugin.LocalRecs.VirtualLibrary.VirtualLibraryManager: Updated Series recommendations for user 2a9bd700-2f3b-4073-bc01-805cf110b1ff: 25 files created
[2026-02-03 17:41:58.114 +01:00] [INF] [104] Jellyfin.Plugin.LocalRecs.VirtualLibrary.VirtualLibraryManager: Cleared all Movie items for user 499401e7-c3e5-490a-b96f-de5a5897ea39 (deleted directory)
[2026-02-03 17:41:58.114 +01:00] [INF] [104] Jellyfin.Plugin.LocalRecs.VirtualLibrary.VirtualLibraryManager: Updated Movie recommendations for user 499401e7-c3e5-490a-b96f-de5a5897ea39: 0 files created
[2026-02-03 17:41:58.114 +01:00] [INF] [104] Jellyfin.Plugin.LocalRecs.VirtualLibrary.VirtualLibraryManager: Cleared all Series items for user 499401e7-c3e5-490a-b96f-de5a5897ea39 (deleted directory)
[2026-02-03 17:42:01.607 +01:00] [INF] [104] Jellyfin.Plugin.LocalRecs.VirtualLibrary.VirtualLibraryManager: Updated Series recommendations for user 499401e7-c3e5-490a-b96f-de5a5897ea39: 25 files created
[2026-02-03 17:42:01.607 +01:00] [INF] [104] Jellyfin.Plugin.LocalRecs.VirtualLibrary.VirtualLibraryManager: Cleared all Movie items for user 373f59cb-23c7-4fe8-b457-8a46d1fdb4ed (deleted directory)
[2026-02-03 17:42:01.607 +01:00] [INF] [104] Jellyfin.Plugin.LocalRecs.VirtualLibrary.VirtualLibraryManager: Updated Movie recommendations for user 373f59cb-23c7-4fe8-b457-8a46d1fdb4ed: 0 files created
[2026-02-03 17:42:01.607 +01:00] [INF] [104] Jellyfin.Plugin.LocalRecs.VirtualLibrary.VirtualLibraryManager: Cleared all Series items for user 373f59cb-23c7-4fe8-b457-8a46d1fdb4ed (deleted directory)
[2026-02-03 17:42:04.512 +01:00] [INF] [104] Jellyfin.Plugin.LocalRecs.VirtualLibrary.VirtualLibraryManager: Updated Series recommendations for user 373f59cb-23c7-4fe8-b457-8a46d1fdb4ed: 25 files created
[2026-02-03 17:42:04.512 +01:00] [INF] [104] Jellyfin.Plugin.LocalRecs.VirtualLibrary.VirtualLibraryManager: Cleared all Movie items for user 7f556e4b-7877-4f73-b7ef-c0c7fb706002 (deleted directory)
[2026-02-03 17:42:04.512 +01:00] [INF] [104] Jellyfin.Plugin.LocalRecs.VirtualLibrary.VirtualLibraryManager: Updated Movie recommendations for user 7f556e4b-7877-4f73-b7ef-c0c7fb706002: 0 files created
[2026-02-03 17:42:04.512 +01:00] [INF] [104] Jellyfin.Plugin.LocalRecs.VirtualLibrary.VirtualLibraryManager: Cleared all Series items for user 7f556e4b-7877-4f73-b7ef-c0c7fb706002 (deleted directory)
[2026-02-03 17:42:07.375 +01:00] [INF] [104] Jellyfin.Plugin.LocalRecs.VirtualLibrary.VirtualLibraryManager: Updated Series recommendations for user 7f556e4b-7877-4f73-b7ef-c0c7fb706002: 25 files created
[2026-02-03 17:42:07.375 +01:00] [INF] [104] Jellyfin.Plugin.LocalRecs.VirtualLibrary.VirtualLibraryManager: Cleared all Movie items for user 9cd10cc4-31bd-4164-9b8b-35f93c6e4e53 (deleted directory)
[2026-02-03 17:42:07.375 +01:00] [INF] [104] Jellyfin.Plugin.LocalRecs.VirtualLibrary.VirtualLibraryManager: Updated Movie recommendations for user 9cd10cc4-31bd-4164-9b8b-35f93c6e4e53: 0 files created
[2026-02-03 17:42:07.375 +01:00] [INF] [104] Jellyfin.Plugin.LocalRecs.VirtualLibrary.VirtualLibraryManager: Cleared all Series items for user 9cd10cc4-31bd-4164-9b8b-35f93c6e4e53 (deleted directory)
[2026-02-03 17:42:10.073 +01:00] [INF] [104] Jellyfin.Plugin.LocalRecs.VirtualLibrary.VirtualLibraryManager: Updated Series recommendations for user 9cd10cc4-31bd-4164-9b8b-35f93c6e4e53: 25 files created
[2026-02-03 17:42:10.074 +01:00] [INF] [104] Jellyfin.Plugin.LocalRecs.VirtualLibrary.VirtualLibraryManager: Cleared all Movie items for user 4367885c-7f64-4b7f-a2a1-f40a09beceec (deleted directory)
[2026-02-03 17:42:10.074 +01:00] [INF] [104] Jellyfin.Plugin.LocalRecs.VirtualLibrary.VirtualLibraryManager: Updated Movie recommendations for user 4367885c-7f64-4b7f-a2a1-f40a09beceec: 0 files created
[2026-02-03 17:42:10.074 +01:00] [INF] [104] Jellyfin.Plugin.LocalRecs.VirtualLibrary.VirtualLibraryManager: Cleared all Series items for user 4367885c-7f64-4b7f-a2a1-f40a09beceec (deleted directory)
[2026-02-03 17:42:12.839 +01:00] [INF] [104] Jellyfin.Plugin.LocalRecs.VirtualLibrary.VirtualLibraryManager: Updated Series recommendations for user 4367885c-7f64-4b7f-a2a1-f40a09beceec: 25 files created
[2026-02-03 17:42:12.839 +01:00] [INF] [104] Jellyfin.Plugin.LocalRecs.VirtualLibrary.VirtualLibraryManager: Cleared all Movie items for user 4ac54fe7-f3e8-480e-b0dc-5e8e7de2ebab (deleted directory)
[2026-02-03 17:42:12.839 +01:00] [INF] [104] Jellyfin.Plugin.LocalRecs.VirtualLibrary.VirtualLibraryManager: Updated Movie recommendations for user 4ac54fe7-f3e8-480e-b0dc-5e8e7de2ebab: 0 files created
[2026-02-03 17:42:12.839 +01:00] [INF] [104] Jellyfin.Plugin.LocalRecs.VirtualLibrary.VirtualLibraryManager: Cleared all Series items for user 4ac54fe7-f3e8-480e-b0dc-5e8e7de2ebab (deleted directory)
[2026-02-03 17:42:15.603 +01:00] [INF] [104] Jellyfin.Plugin.LocalRecs.VirtualLibrary.VirtualLibraryManager: Updated Series recommendations for user 4ac54fe7-f3e8-480e-b0dc-5e8e7de2ebab: 25 files created
[2026-02-03 17:42:15.603 +01:00] [INF] [104] Jellyfin.Plugin.LocalRecs.ScheduledTasks.RecommendationRefreshTask: Waiting for file system flush before triggering library scan
[2026-02-03 17:42:16.809 +01:00] [INF] [40] Jellyfin.Plugin.PlaybackReporting.EventMonitorEntryPoint: Processing playback tracker : "38896a97-12a6-4bee-a6b0-564f1491236d-7f556e4b78774f73b7efc0c7fb706002-31df838ab9037c0c9d349118c9e33028"
[2026-02-03 17:42:17.603 +01:00] [INF] [78] Jellyfin.Plugin.LocalRecs.ScheduledTasks.RecommendationRefreshTask: Triggering library scan for virtual recommendation libraries
[2026-02-03 17:42:17.603 +01:00] [INF] [78] Jellyfin.Plugin.LocalRecs.ScheduledTasks.RecommendationRefreshTask: Virtual library files updated successfully
[2026-02-03 17:42:17.603 +01:00] [INF] [78] Jellyfin.Plugin.LocalRecs.ScheduledTasks.RecommendationRefreshTask: IMPORTANT: Please manually scan the recommendation libraries via:
[2026-02-03 17:42:17.603 +01:00] [INF] [78] Jellyfin.Plugin.LocalRecs.ScheduledTasks.RecommendationRefreshTask: Dashboard → Libraries → [Your Recommendation Library] → Scan Library
[2026-02-03 17:42:17.603 +01:00] [INF] [78] Jellyfin.Plugin.LocalRecs.ScheduledTasks.RecommendationRefreshTask: OR wait for the next scheduled library scan
[2026-02-03 17:42:17.603 +01:00] [INF] [78] Jellyfin.Plugin.LocalRecs.ScheduledTasks.RecommendationRefreshTask: Automatic scanning is disabled to prevent .strm file removal issues
[2026-02-03 17:42:17.603 +01:00] [INF] [78] Jellyfin.Plugin.LocalRecs.ScheduledTasks.RecommendationRefreshTask: Recommendation refresh completed in 383.04 seconds: 7/7 users successful
[2026-02-03 17:42:17.603 +01:00] [INF] [78] Emby.Server.Implementations.ScheduledTasks.TaskManager: "Refresh Local Recommendations" Completed after 6 minute(s) and 23 seconds

and the benchmark

================================================================================
Local Recommendations Benchmark Results
Timestamp: 2026-02-03 16:22:25 UTC

1. Library Analysis

   Total Items: 2,780 (0 movies, 2,780 series)
   Analysis Time: 324,234 ms

2. Vocabulary Building

   Genres: 16
   Actors: 500
   Directors: 779
   Tags: 500
   Total Features: 1,805
   Build Time: 16 ms

3. Embedding Computation

   Total Items: 2,780
   Total Time: 288 ms
   Avg per Item: 0.10 ms
   Vector Dimension: 1,805

4. User Profile Generation

   No users with watch history found

5. Recommendation Scoring

   No users with watch history found

================================================================================
Summary

Total Time: 396,273 ms (396.27 seconds)
Peak Memory: 895.16 MB
Memory Delta: 84.00 MB

Performance Assessment:

[FAIL] Time: Completed in 396.3s (target: <120s)
[WARN] Memory: 895.2 MB (target: <100 MB)

================================================================================

Expected Behavior

recommandation for movie and tv show

Relevant Log Output

Checklist

• I have searched existing issues to ensure this bug hasn't been reported
• I have sanitized all personal information from logs and descriptions
• I am using a supported version of Jellyfin (10.11.5+)

[rdpharr]

hi @neotwix - the movies problem looks like it's because it's not finding any movies in the library to recommend. Does that seem right?

For TV shows, it's telling us that the users don't have enough watch history to make recommendations. I think that's a bug (it's only counting fully watched series). I'll be sure to do a release this weekend to fix it.

[rdpharr]

Thanks for reporting this! I've investigated and here's what I found:

TV Recommendations — All Users Getting the Same Results

This was a bug. The user profile builder required userData.Played == true to include a series in your watch history. For TV series, Jellyfin only sets this flag when every single episode has been watched. Since none of your users had fully completed a series, the system thought nobody had any watch history and fell back to generic top-rated recommendations (identical for everyone).

Fixed in v0.5.1 — The plugin now checks for any watched episodes at the episode level, so partially watched series correctly contribute to each user's taste profile.

No Movie Recommendations

Your logs and benchmark show your library contains 0 movies and 2,780 series:

Total Items: 2,780 (0 movies, 2,780 series)

If this is expected (your library is TV-only), then 0 files created for movies is correct behavior. If you do have movies in your Jellyfin library, they may be in a library that the plugin isn't scanning — could you check your Jellyfin library configuration?

Next Steps

Please update to v0.5.1: https://github.com/rdpharr/jellyfin-plugin-localrecs/releases/tag/v0.5.1

After updating and running a recommendation refresh, your users should get personalized TV recommendations based on their individual watch histories. Let me know if the TV recommendations improve and whether the movie situation is expected for your setup.

[rdpharr]

I haven't heard back from you, so I'm going to close this issue. Feel free to comment or open another if your issues persist!