Thread:BippityBop/@comment-34953493-20180311052811/@comment-28450065-20180311130214

All creatures try to stay around their spawn point, this includes spawned creatures. So if you spawn them in the air and they fall down to the water they try to get back to where they were spawned. Things flying away when you spawn multiple is also normal, since their hitboxes are all colliding and that causes some shenanigans.