Server Version#: 1.25.9.5721
Player Version#: Nvidia Shield 9.0.6.31998
I’m posting this in Server since I have exactly same issue on 2 different player. Server is running on Unraid machine, Nvidia Shield and Google Chromecast have exactly same issue. When trying to seek BACK (10 second), video will buffer and actually resume 1 minute later. When I took logs I replicate the issue reading this file :

At 5:30 I press seek back, progress bar went to 5:20 while spinner show and then show resume at 6:30.
Started about 2 months ago.
Plex Media Server Logs_2022-04-20_21-15-34.zip (4.8 MB)
Anybody can shed some light on this annoying issue ?