With the autocomplete option on for Studio, scrolling through touchpad gestures or the scrollbar while typing causes the autocomplete frame to stay suspended in the previous position until you delete the previous text (when you press the backspace key to delete the text, it automatically scrolls down as well, causing you to lose focus of whatever you were inspecting).
Video of the bug occuring:
This bug causes you to have to delete whatever you were typing to scroll without the frame getting in your way on top of code.
The bug only occurs in the script-editor of course, while deciding to scroll while typing in an incomplete line of code.
The date it started occurring is not known.
Type some incomplete code in the script editor and scroll in any direction, the frame should stay there and not disappear.