LOS may not work. Nothing else. And it will work in most cropped/flipped situations, just not all. I fixed the fullhex cropping so that los will work when you crop to a full hex. That was the part of the problem in the OP for this thread. So, it seems that setup files where the board was cropped to a full hex will not have los enabled even if running 6.5.0.Hm, but I'd say the majority of scenarios use flipped boards or half-boards (i.e. cropped boards) of some sort.
What are the consequences of not redoing the whole board setup in such cases?
von Marwitz