Weird behavior in fullscreen on Mac

When going into fullscreen there's a 94px margin at the top (on a 1920x1200 display) and everything looks slightly compressed. Furthermore, the mouse cursor position does not correctly correspond to the UI interactions, so that for example a button will be highlighted and clickable even though my mouse cursor is vertically above the button and not touching the button. The discrepancy seems to get worse the higher up on the screen the mouse cursor/UI element is.