Plex buffering & stuttering issues are not a new topic on Plex and othe related forums. It's very annoying that the movie stops every minute for few seconds.

I got a Synology DS718+ and when watching movies h.264 1080p on my Samsung TV QE55Q7, the Plex keeps lagging constantly. If I fast forward to half way, it will buffer forever. When I watch a 4K HDR file streaming from my Western Digital My Passport Wireless Pro to my LG OLED LG OLED55E6P using the Plex app, I get buffering throughout the film to the point where I have to stop watching it. I had the correct IP, router, and DNS settings, the Plex Media Server was online, the network was good, the TV had an internet connection, Netflix worked fine but Plex would not connect.Plex Buffering & Stuttering Issues with 4K, Xbox One So not being able to connect the app to the network was annoying, to say the least. Once the Plex app would open and stay that way, I wanted to get up and running as quickly as possible. Plex Samsung smart TV app will not connect to the Plex Media Server It takes a few minutes to reset and reboot but once done, the Plex app worked perfectly.

Navigate to Settings, Support, Self Diagnosis, and Reset.

I had to perform a factory reset on my TV in order to get this to work. Yet every time I opened it, the app opened to the plash screen and then closed again. The app installed without a problem and appeared in the apps list. I had a good WiFi connection to the network the Plex Media Server is on and everything looked good. I had performed a firmware update on the TV to get the latest version of the Samsung Smart Hub. This problem took the longest to figure out. Plex app opening and closing on a Samsung smart TV Both of which I was able to figure out with a little help from the web. The second, the app would open but not connect to the Plex Media Server.

First, the app would open and then immediately close. I had a couple of problems with my setup that took a couple of hours to figure out. Troubleshooting Plex on a Samsung smart TV

Samsung tizen plex