I get the similarity, but perhaps Iron Golem's size could be taken into consideration, as this also affects the pathfind. The Golems are getting stuck not because they can't reach the other side of the wall because of a heigh diference, but because of the size of the other Golems.
Same here, but mine looks slightly diferent. It goes away if I remove the map from my had and select it again, or If I load the save again.
Also, I'm playing in 1.14.30
Thanks, I'll do that the next time.