@leocg i dont know about him but is is happening to me too since yesterday opera gx was also spiking my i7 10870h at like 75% and after 10 minutes it went down to 20 % with still a flashing white screen where it normally sits at 5 or 6% it seems that the searchbar and everything besides and above that are fine i can open the downloads bar on the top right and it loads perfectly but the hamburger menu doesnt. if i go to youtube i see a pink screen where i think an advertisement is supose to be and i am able to right click and pause / play videos but just cant see them. it cant be a graphics driver issue since mine is up to date and i updated it last week and it only happen this evening. hope this helps i dont know if you need my opera log menu and i also dont know where i can find that since my opera is unusable 🙂
i hope to see a reply and a fix soon