Small Magma Cubes have large hitboxes

Expected Result: Hitbox should be approximately the visual size

Observed Result: Magma Cubes seem to have a hitbox much larger than their actual visual size. They are able to seemingly float on air.

Steps to recreate: As seen in the attached image, I have a 2x2 block area that the magma cube should fall through, but doesn't because it's massive hitbox is clipped onto the corner of a nearby netherrack block.