Flickering on all VA panel when gsync on

[Slender]

i had old 144hz va and new 250hz fast va, both literally same issue, screen flickering when fps changes or low fps, most intention on 60hz / 60 fps. How to fix that?

[Slender]

gsync pendulum demo 50fps maximum flickering

[Slender]

set vrate to 100-126 hz fix flickering, but that mean gsync stop working on 75fps, with vsync on?