@imprzz i had this extension. this might be one of the culprits

@daddyvoid i just followed kopollo's instruction in resetting the browser. here's what they said:
Reset Opera settings: Resetting Opera to its default settings can help eliminate any problematic configurations. To reset Opera, go to the menu, select "Settings," scroll down to the bottom, click on "Advanced," and select "Browser" from the left-hand side. Scroll down to find the "Reset settings" button and click on it.

@daddyvoid i reset the operagx settings and it somehow works and the browser went stable, i will still observe if this issue will appear after some time after resetting the browser settings

@psychofok it's happening to me as well it's annoying