Fullscreen and HDR (with Asus PG27UQ)

[Zuub1981]

I seem to have a very weird bug that happens with Asus PG27U (the Gsync HDR monitor). Every time I change I try to change the HDR slider, the monitor flickers black with every move on the slider. It also happens when I change the volume of sound. Every move of the volume the monitors flickers black and then returns.

The only "fix" is switch to window mode as it only happens on fullscreen.

Anyone have that?