This is really annoying. If I place characters on unreachable roofs and have them patrol random reachable locations, sometimes they will keep patrolling on that roof like they should, and sometimes they will get unreachable destinations. But it seems to depend mostly on what roof they are on, even though there is no obvious difference… The ones that are on the kind of roof that produces unreachable destinations, virtually never get destinations on THAT roof, but always in another (yet always the same) isolated nav-area, as if the origin was in that other area. ONLY IT’S NOT.