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Description
If the autocomplete is acting as a select, I think it should reset the scroll position of the select if you open and close it. At the moment it's retained - so if you open it, scroll down, close it, then open again, you get returned mid-scroll.
If we're trying to act in a similar way to selects, opening the autocomplete should be as if it's first opened.
Similarly, if auto-select is on and you type in the box, an item might get selected above the scroll, but it isn't visible - we should scroll to the top / scroll to the selected item (same thing?).