End Gateways spawn not in a perfect circle and even off-center in the four cardinal directions. 

In 1.18.2 and 1.18 they spawn at (96,0), (91,29), (77,56), (56,77), (29,91), (-1,96), (-30,91), (-57,77), (-78,56), (-92,29), (-96,-1), (-92,-30), (-78,-57), (-57,-78), (-30,-92), (0,-96), (29,-92), (56,-78),(77,-57), (91,-30)

Can confirm that this is not an issue in 1.12

In 1.12 End Gateways spawn in coordinates of (0,±96), (±96,0), (±91,±29), (±29,±91), (±77,±56), and (±56,±77){}

Cannot confirm which version the spawning changed