Thank you AnotherDude,I use the CalDay/Night modes which I calibrate with CalMAN Enthusiast and never have seen that, but I only use a BD player and DirecTV. All that Smart stuff is turned off.
I calibrated SDR with the new FW at a non-standard 300 nits and wow it looks great. Took me a bit to get used to the bright picture (I watch a lot in a dark setting) but amazed there's no white crush, everything is brighter but relatively the same. Black crush is barely there, nice shadow detail and dimming appears better behaved. I found it better to have a higher Backlight with a lower Contrast to get the 300 nits. With the higher Contrast I get some pinkish cast in the brighter white levels after calibration. Could be my panel maybe, but this is now my best looking calibration.
I watched some 4K discs in my CalDay mode. HDR calibration uses separate settings and I can't currently calibrate (no HDR pattern generator) but it looked great with Backlight 45, Contrast 40, Brightness 1, Local Dimming Low, ColorSpace Auto, Gamma ST.2084 0. All enhancements off.
I haven't used my calibration disk yet since the tv is only a few weeks old and still burning in. I have it dialed in very nice by eye thus far. I'm not one guys that likes my tv as bright as the sun, my settings are:
back light 26
tone warm 2
gamma BT.1886 +3
color space native
these settings in my room create a nice natural looking picture with inky blacks and little or no Black crush. I found that all of the other gamma settings crush the blacks too much for my liking.
I mostly watch cable and their premium channels e.g. hbo, showtime etc. I'm giving allot of thought to getting DirecTv again since the last time I had it the picture was superior to cable.
The flickering issue only seems to happen or be noticeable during movie credits except for once when I was playing an xbox game where i could see it really bad till I switched picture mode to Game.
I will likely dial in the picture with my calibration disk during the xmas week since I'm on vacation that week and the tv will have 100+ hours on it by then.