Hi all, I too am having a similar issue with a Q6F - 55inch. Everytime I customize the HDR look on my TV and select Gamma: BT 1886, it will hold for 10-15 sec. before switching back to ST. 2084. The change in picture profile is quite severe, going from a lush and evenly lit picture to a dark and desaturated image. This happens using the native streaming apps on the TV and also in Apple TV. I have tried turning off all other automatic picture options in the settings tab, but alas, I am not able to retain the BT. 1886 profile. I read somewhere on rtings.com that the TV defaults to ST. 2084 by default, but this seems strange. If Samsung is giving us the option to customize the picture profile down to the gamma, then you would think the settings would hold in place and not switch back to some automatic default. I am thinking this is a bug, unless someone else has a solution.
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