For whatever reason, it seems like the Dynamic Black Equalizer within the Game Mode settings is messed up. Off is the same as option 2, somewhat overbrightened and blacks are a little washed out. Option 1 has deep blacks and isn't as bright as "0" and "2".
Meanwhile, in SDR Game Mode, Dynamic Black Equalizer makes the image increasingly brighter at a consistent rate the higher you turn it up. So options "1-5" get steadily brighter. Dynamic Black Equalizer doesn't function this way while in HDR which leads me to believe it is a bug.
I've tried resetting my TV and have tried different HDMI 2.1 cables. The setting does the same thing on PS5 and Xbox Series X when gaming in HDR. I believe the while in HDR Game Mode, the Dynamic Black Equalizer's "0" setting should be switched around with "1" so that "1" functions as "0".
The other option would be a firmware patch or perhaps letting us have separate Game Mode settings for HDR and SDR gaming on the same input.
