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Jellyfin playback going back to the start, trying to troubleshoot but not successful - Printable Version

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Jellyfin playback going back to the start, trying to troubleshoot but not successful - ev1lchris - 2025-08-18

Videos Keep Restarting to Beginning on Galaxy Tab S6 and Windows clients
I’m running Jellyfin Server on a mini-PC (AMD Ryzen 7 5700U @ 1.80 GHz, 16 GB RAM) under Windows 11 Pro, and streaming to a Samsung Galaxy Tab S6 via the Jellyfin Android app. As soon as I start a video, it plays fine for a bit, then jumps straight back to 0:00—over and over.

Environment
  • Server OS: Windows 11 Pro
  • CPU / GPU: AMD Ryzen 7 5700U with Radeon Graphics
  • RAM: 16 GB (12.9 GB usable)
  • Storage: 1 TB SSD (760 GB used by Jellyfin?)
  • Jellyfin Server Version: please specify
  • Android Client: Galaxy Tab S6, Jellyfin Android App vXX.XX

What I’m Seeing
  1. Launch any video (local library, H.264 or H.265)
  2. Video plays for 30–60 seconds
  3. Playback suddenly resets to the beginning
  4. Happens every single title, whether direct-play or transcoded

Steps I’ve Taken
  • Fully uninstalled and reinstalled Jellyfin Server
  • Uninstalled and reinstalled Jellyfin Android app
  • Verified Wi-Fi signal: 5 GHz network, no packet loss
  • Disabled hardware acceleration in server settings
  • Cleared Android app cache & data

Strange Observation
My
data
folder on the server has ballooned to ~760 GB, despite having only ~300 GB of media. I can’t figure out what’s consuming the extra 460 GB.

Logs & Info Requested
I’m happy to upload logs or config files. Here’s what I can grab right now:
  • Jellyfin server log:
    C:\Users\<User>\AppData\Roaming\Jellyfin\Server\jellyfin.log
  • Transcoding temp folder:
    <JellyfinData>\transcoding\
  • Database size:
    <JellyfinData>\data\jellyfin.db
Let me know if there are specific log lines or diagnostic files you need.

Questions for the Community
  1. What could cause playback to restart on an Android client?
  2. How do I safely clear out temporary/transcoding files without breaking my library?
  3. Is there a hidden cache or database blob that’s bloating my drive?
  4. Any known bugs in recent Jellyfin versions that match this behavior?
Thanks in advance for any pointers—really stuck on this one!

RE: Jellyfin playback going back to the start, trying to troubleshoot but not successful - visualblind - 2025-08-20

(2025-08-18, 04:21 AM)ev1lchris Wrote: Strange Observation
My
data
folder on the server has ballooned to ~760 GB, despite having only ~300 GB of media. I can’t figure out what’s consuming the extra 460 GB.

Does the same media file with the problem in Jellyfin play fine when using a desktop player?

This quote above leads me to believe there is a more fundamental problem with your media (corruption etc).

RE: Jellyfin playback going back to the start, trying to troubleshoot but not successful - ev1lchris - 2025-08-20

(2025-08-20, 08:10 AM)visualblind Wrote:
(2025-08-18, 04:21 AM)ev1lchris Wrote: Strange Observation
My
data
folder on the server has ballooned to ~760 GB, despite having only ~300 GB of media. I can’t figure out what’s consuming the extra 460 GB.

Does the same media file with the problem in Jellyfin play fine when using a desktop player?

This quote above leads me to believe there is a more fundamental problem with your media (corruption etc).

It seems to work fine with the Windows Jellyfin Media player on a local connection.

I think when I try to view it from an outside network I get the same problems.

Does Tailscale prevent a problem?

RE: Jellyfin playback going back to the start, trying to troubleshoot but not successful - visualblind - 2025-08-20

(2025-08-20, 10:11 AM)ev1lchris Wrote:
(2025-08-20, 08:10 AM)visualblind Wrote:
(2025-08-18, 04:21 AM)ev1lchris Wrote: Strange Observation
My
data
folder on the server has ballooned to ~760 GB, despite having only ~300 GB of media. I can’t figure out what’s consuming the extra 460 GB.

Does the same media file with the problem in Jellyfin play fine when using a desktop player?

This quote above leads me to believe there is a more fundamental problem with your media (corruption etc).

It seems to work fine with the Windows Jellyfin Media player on a local connection.

I think when I try to view it from an outside network I get the same problems.

Does Tailscale prevent a problem?

It sounds like something is happening to your outbound/egress internet traffic, by your description. You could try Tailscale which is basically Wireguard VPN, or use Wireguard VPN directly. If you have a way to use a separate internet connection in order to rule out whether your primary is causing the issue, I would do that instead.