I had timed traffic lights working fine for quite a long time, but after loading the savegame recently the intersection was broken. The nodes disappeared and when I try to reselect all of the intersections again they get removed shortly afterwards. I tried to update some of the roads in order to update or rebuild the intersection. some of them are working individually again, but if i select all intersections it starts breaking. Any other way to get this working again besides destroying the whole road network?