@dcscotland I tried downloading the normal Opera and this glitch doesn't happend over there, I believe is this new uptade they released, before that my youtube didn't do this. It's been 8 days since it first happend, and so far it's still happening. Is almost as if the browser is not recognizing my youtube settings, in which is set to night mode and autoplay disabled.

@dcscotland Thanks for the reply, but I do not have this extension you mentioned. The real issue for me, is no the white screen blink, it’s the autoaplay on youtube that turns back on everytime I refresh the page

Everytime I refresh the page on youtube, I get an white screen blink very fast.
Also, I have autplay disabled, but everytime a open a new video, it's turned back on. This started to happen 1 day ago, my Opera GX verions is the 83.0.4254.70.