@fehlberg yeah something similar happens to me too. Only it happens while I'm in the midst of typing so say I want to search up "High on Life performance optimizations you can do" or something, well previously I searched up "High on life fov mods" or whatnot, but while I'm still typing in the search it autofill's the previous search I had, like it pastes it in there on its own. Its super annoying. So sometimes my search results look something like "High on life performance optimizations you can dofov mods." It Automatically ADDS the part of a search I'd done before into my current ones so I have to grab my mouse, click the spot up to the point I want to delete, and just hold delete until that other crap I don't want in my search is gone... Obviously I'm going to shut off autocomplete at this point if I can figure out how to do so. Its atrocious.

EDIT: Okay figured out what was causing that to happen to me. I had to shut off the "Use a prediction service to help complete searches and URL's typed in the address bar" setting in opera GX settings under Privacy and Security.
As for you there is no way to shut off that suggestion fill, however, whatever is in the highlighted zone if you wanna just search up Opera instead of Opera forums or whatnot, just hit Backspace or delete before you hit Enter and the search suggestion will disappear, then hit enter and you'll just search what you typed in. No way to shut that off from what I can tell.

@fehlberg yeah something similar happens to me too. Only it happens while I'm in the midst of typing so say I want to search up "High on Life performance optimizations you can do" or something, well previously I searched up "High on life fov mods" or whatnot, but while I'm still typing in the search it autofill's the previous search I had, like it pastes it in there on its own. Its super annoying. So sometimes my search results look something like "High on life performance optimizations you can dofov mods." It Automatically ADDS the part of a search I'd done before into my current ones so I have to grab my mouse, click the spot up to the point I want to delete, and just hold delete until that other crap I don't want in my search is gone... Obviously I'm going to shut off autocomplete at this point if I can figure out how to do so. Its atrocious.

EDIT: Okay figured out what was causing that to happen to me. I had to shut off the "Use a prediction service to help complete searches and URL's typed in the address bar" setting in opera GX settings under Privacy and Security.
As for you there is no way to shut off that suggestion fill, however, whatever is in the highlighted zone if you wanna just search up Opera instead of Opera forums or whatnot, just hit Backspace or delete before you hit Enter and the search suggestion will disappear, then hit enter and you'll just search what you typed in. No way to shut that off from what I can tell.

I had the same issue today actually. If you right click the duplicate tab and hit "Close tab" that should get rid of it. Worked for me, now I just have the one GX corner again. It basically just opened a duplicate tab of the GX corner like any other tab, just without the little X to close it like all the others.