@nebulaeted Maybe I am misunderstanding . All I can say is, my system has 2 monitors, one runs at 240hz and other at 72hz and I don't see any slow downs of the way you describe. I have an Nvidia card, you have AMD I believe so I still think it is a video driver issue , not an opera issue, as you also say it is an issue that happens on all. But maybe I'm wrong It wont be the first or last time.

I am facing the same issue since morning. Looking for some help from expert person. Please guide me in this regards. Thanks

@ultravio1et
That is exactly what I had said 6+ months ago. 1st complain here
https://forums.opera.com/topic/31346/what-still-bugs-me-in-opera-on-linux-and-in-general