Plex Streaming on TV

I’m not really sure what issue I’m having. I’m able to watch all of my Plex movies and TV shows without any issues on my computer my phone and a few other device devices that are not on my own network. The issue comes in when I try to watch any new movies that I’ve just added on my TV. They proceed to stutter and then stall out my entire TV where I have to unplug and unplug it back in. I’m wondering what may be going on with this and what I could probably do to fix it.

My Specs:
Synology NAS: DSM 7.4.1-90080 Update 1
Plex Server: v.1.43.5.11079-720011079
T.V. Model: Samsung 50" Crystal UHD

You should probably start by giving basic info. Notably what the TV is, what version of the Plex app your are using. What version of Plex Media Server you are using and what it is running on might also help in case this is an issue with material being transcoded so it works on your TV.

I added the info