Weird thing happening

Hello i am currently having some issues using the brave browser. The problem might be from NVIDIA but i dont know. It started happening after i finally updated windows to 20h2. Before the update, i didnt have this problem. It started to occur just after windows’ update (before the windows update i had latest nvidia drivers). The problem is: When on any refresh rate but 50 hz applied, the screen would just go black for 1-2 seconds, then if you move your mouse or click, it will turn off again. I need help!!! PS: the screen will turn off only when in brave. all other apps work perfectly.