Hi! Please help us already, it has been already 4 months!
Youtube app do not work properly when watch 1080p or 4k / 4k 60fps videos. It buffers a lot, freezes the app, drops to 360p, after last update on 2018 models. From 7472 to all the top. Only solution from now on is Connectiion through Ethernet , so i think that the update had to mess something with wifi Connectiivity even on 5ghz fiber optic internet 1gb
Please read also 16 pages from this topic where tons of People have the same problem :
Kamil, with 55nu8072 and 65q7fn