I own a VP Leica cine play 1 based on Vidaa OS.
With V7.6 and Plex client 5.91.2, I faced the same buffering issue when playing my local content as described above.
After Vidaa OS update to V9.01, I had to reinstall Plex that was uninstalled after OS update.
Plex is now working fine without buffering.
Plex client version is : 5.93.2
I hope it will help other facing the same buffering issue.
