Plex on Nvidia Shield TV 2019 (Tube) 4K HDR lag, crash, restart

Have also a tube 2019.
My Pms is running on a DS918+.

The Nvidia shield is just a hype. I am very disappointed.
No stable 4K with Atmos. Same as most other users.

Nvidia you failed here completely.

P.S: Unfortunately i can not write in that topic anymore: TrueHD, HDMI on LG OLED but @TeknoJunky wrote that the solution shall be great.

Well i have a 2019 LG OLED 4K, a Canton Smart 10 Atmos soundbar and now a Nvidia Shield TV Tube.
The PMS is running as mentioned on a DS 918+ synology.
The equipment ( nvidia shield + 4k/hdr/atmos receiver + 4k tv ) is powerful, but not running stable