Thankyou
Just to further add I’ve been trying to take a peak at the issue
I setup the Fixed Point Camera so i could see what was happening. It looks like the chickens actually teleport themselves away from the enclosure thus triggering the distance check and teleporting back. You can sorta see the issue in the yt vid i will link below.
On another note if i sit and watch the chickens via the camera then they never actually do anything ie go past the wall so idk if they is a distance thing connected to the camera and player but that’s also odd how they don’t escape when spectating them via the camera device
At the end of the vid you can see it teleport outside the area and just go for a stroll 
