I have the 82", it was delivered in May. The only problem I have seen is on some channels, usually the local networks on Directv while watching sitcoms, I see frame dropping causing the motion to not be smooth. Other channels no problems. Also no problems with streaming from Netflix or Amazon Prime and no problems when playing a blu-ray. So my guess this problem is with the Directv 4K box and not the TV.
One weird thing yesterday I keep getting a popup saying the TV was blocking a malware file Libecore_con.so.1.16.0. Popped up about 100 times then stopped.
Frame dropping fixed after using the settings in the rtings link in the other reply.
Last edited by Newfi; 09-03-2018 at 10:10 AM.