I see other people have got similar problems as me so i thought i would see if there is a solution before i contact support.
My tv is a QN94AA, My Gfx card is a Radeon rx 5600 xt, i'm using a HDMI port 2.0b, then i'm using an Amazon 8k cable to my tv.
https://www.amazon.co.uk/dp/B08BRZXCNH?ref=ppx_yo2ov_dt_b_fed_asin_title
When i turn on Game Mode the screen goes from very bright to dim and washed out. VRR is enabled but HDR is not even though HDR is enabled in my display settings and set to 4k.
Any ideas how to solve this guys? Thanks 
