The axolotls I have in a large tank without a layer of air have been swimming towards a single corner of it in the southeast direction. I've attempted checking for water around the area that's confusing the pathfinding, tried using soul sand bubbles to push them away, and even just blocking that corner. None of this works and they keep piling up in a single corner versus swimming around the entire tank. A temporary solution has been using multiple bubble columns and a trapdoor to keep them moving, but they keep going to that single area and getting stuck for no reason.