Been having problems with my set today and it may appear that certain apps will reset the settings for the display.
I have a digital UHD copy of Spidey Homecoming on Vudu so I started the app up and for the first time, I got a Dolby Vision notification rather than the standard HDR notification that pops up. The problem was the picture was really dark. I checked my settings: Bright, Dark Dolby, 100 Contrast, 50 Brightness, 100 Backlight. Looked fine there.
I jump to my FandangoNow library using the native tv channel, launch Spidey there. Picture is crisp, good brightness, not dark, same settings. Problem here is the screen cuts off and goes to that popcorn / no signal screen off and on. App appears to be bunk.
I then jump back to the native Vudu app, no notification, no dolby. still dark picture, my settings are reset and no option to choose Dolby (just movie). I try my UHD copies of Guardians 2 and Arrival on Vudu, and can't get either to play in 4K / HDR. A quick check in the Vudu settings show that 4K resolution is still my default setting.
I need to test my 4K discs and see if i notice any changes there.
The only other thing I can think of is my broadband is being bottlenecked?