I posted about this on xwitter but I think people here might appreciate this discovery - on any keypress, and constantly if you hold down any button, the Opera GX AI that you don't seem to be able to fully turn off clones the HTML elements of the body of the page you're currently on. (to process it? idk)
this has caused some major issues because it constantly re-calls constructors on custom elements and stuff - took a while to figure out, but when we actually tracked it down to this, I could hardly believe it. there's no way this runs well on pages that have a lot of HTML content lol
(edit - further discovery: this seems to only be executed on the 'focused element' - like if you're typing in a textbox then it only looks at that textbox. but if you don't have a focused element, that's when 't' becomes the body element as a whole)