I have no issues like you with an LG OLED77G48LW
Just once a day, mysteriously the app disconnects for a few seconds. But it reconnects fast and resumes the playing media
But there are not really updates to the LG app 
Like/vote up my post, so maybe we can get some attention to the LG TV app overall…: Plex GUI slow on LG & Samsung TVs - #136 by Red-Naxela
