Once you summoned units in combat, the position swap is not working properly anymore.
To demonstrate it, I made a video again:
https://www.youtube.com/watch?v=QFzYVeVz3R0
Minor issue while we are on it: The Guard's Animation speed is much faster than the animations from other mobs from the first zone.
PS: Would really love an answer on the Speed issue over here
Because changing something in that matter after release, potentially gimping some groups, would lead to grumpy players for sure.