Screen Blink Bug at RTX2080

Sounds pretty much like GeForce experience conflict. Consider disabling it, the overlay has caused some users to experience UI issues, mostly performance and usability.

Even if it does not solve it for you, you’ll will at least know it’s related to something else.

I want to communicate this problem to
the developers. What should I do?

https://epicsupport.force.com/unrealengine/s/