Under OS X, Cubase 8.5 has a bug concerning the inspector view for marker tracks. As shown in the attached screenshot, the inspector’s content has a scrollbar (the thin and bright one) while the inspector itself has another scrollbar (the fat one that is clipped in half by the inspector’s boundary). The result is very confusing, allowing you to scroll the top of the list off the visible area.
Moreover, the settings icon at the far bottom doesn’t do anything at all. If there is no function, the icon should be hidden.
Another thing: Not a bug, but I would like to see the marker’s description in the list. The description is far more interesting than the position, and the ID column could be removed from this view IMO.