I agree with Stefan about excessive buffering. Ethernet connection to the router makes no difference, and no one else using the connection. I am on an fttc fibre line at 50Mbps, so it should require only minimal buffering.
I have tried switching off and disconnecting the supply, also resetting to factory defaults etc etc to no avail.
When I bought the TV at first, about two years ago, I did not notice the problem., and was able to watch a Netflix movie and YouTube concert all the way through.
I notice this thread started in February. Does LG not take any notice of this forum?