Elder Guardians can pass through blocks and worldborder when they are spawned

Summary
The Elder Guardian hitbox intersects with blocks when they spawn, causing them to be able to travel through solid or glass blocks, and the world border.

Expected:
Elder Guardions are pushed away from the blocks they are slightly intersecting on spawn, instead being allow to jump on them (like players who intersect a door).

Current behavior:
Elder Guardians appear to choose a random direction to jump (as if they are on land, or rather, not in water), and jump towards that direction. If they are inside a block or the world border, they pass through that block without issue.