LG CX 48", connected via 5GHz wifi, Netflix speed test is 81Mbps.
Using LG OS Plex app only, streaming from my Plex media server on a Synology DS920 NAS with no upgrades. I have a Plex pass.
No issues with streaming even fairly large/high bit rate 4K HDR files. I do however have massive issues with certain files if I add subtitles (even SRT), but I gather this is a known issue because it starts trying to transcode everything which pushes the bitrate stupidly high.
I've had lots of issues with my Plex on my LG CX this weekend.
As above specs
Watched Batman Begins, The Dark Knight, The Dark Knight Rises, and Joker.
Movie 1 absolutely fine, 4K HDR, no issues. Movie 2 4K HDR initially fine, unwatchable when subtitles added (yes even OpenSRT not PGS subtitles downloaded directly from within plex), Movie 3 the same, had to change file entirely, Movie 4 had to change file, and change audio from DTS 7.1 to AC 5.1 but then no issues subsequently.
Really a bit frustrating. My wife won't watch anything without subtitles on, so it adds a fair bit of hassle. A couple of times I've given up and just played it on VLC on my PC and taken my keyboard to use as a remote if required. But wondering if I should eventually get a Shield Pro or something. It should just work though!!