When an atlantean villager was under attack, it did not respond for 3-5 seconds to go to the requested rally point, even while spamming the location.
There was nothing blocking it so no cause for it to happen.
Screenshot:

I’ve had a similar case with a group of units in another game with Norse, but then there was a small pond just in front of the rally point so they got confused.
When putting the rally point further away from the pond, they did go to it.
And this out of 11 games which is much better than during the beta where it occurred much more often.