Somehow, last patch, they put in - or reasserted by mistake - the code base they were using for attack line and distance from D:OS2. In that game, exactly where you targeted on a figure mattered, because several skills took modifiers off distance from character to point of contact.
So, for some reason now, it measures your actual cursor position for determining high ground on the tooltips - specifically on the tooltips! The *actual* rolls for whether you have advantage or not are fixed on actual character position; the tooltip will just be wrong in one position. Good luck knowing which one before you shoot; there's no way to tell.
