When activating the Overlay Scrollbars in opera:flags, M1 can be used to control the scrollbar for a few seconds and then it won't function with the M1 anymore but the scrollbar will then only work with the scrollwheel or the scroll down keys. Fyi "M1" is the left click on the mouse/trackpad.
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Overlay Scrollbars bugOpera for computers
Pasting words into searchbar will sometimes attempt loading a website insteadOpera for computers
Sometimes but not rarely when I copy/paste a word into the search bar, I will be directed to a website or sometimes the result shows as a missing/unknown website error as if I typed in a link instead.