I updated the Plex Server to v1.23.2.4656.
On a Synology 1520+.
After that I can’t play any 4 k movie. The CPU Load is near 100% and the movie plays for 2 Seconds than stops and after a few seconds it play again for 2 seconds.
I have tested 1080 movie. the CPU load is again near 100%, but the movie plays without pause.