I see this was marked as fixed for 1.4, but I am getting major pathing issues on 1.4.2f8.
On large or complicated maps (e.g. Arcane Prison from the Workshop maps), if you dismiss a rally flag, the minions will remains standing where they are and complain about not being able to reach food/lair. I often have to put a rally flag back down the path and then release it.
Customer support service by UserEcho