Strange square like water and lava pool generation when in Swamp/Modified Jungle Edge biome.

The bug

I found a strange oddly square-like water and lava pool generation when I was in a Modified Jungle Edge/Swamp biome, the lava pool was just above the water pool. I don't know if this was just luck or not, but I thought I would just report it anyway, just to make sure.

How to reproduce

Seed: -747741104223123254
Coords: /tp @s 1816.61 74.69 2215.38 -32.10 7.50