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

[ev1lchris]

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!