Water generating above lava, creating square patches of obsidian

The bug

Water has generated directly over lava, creating a diagonal square of obsidian. The water then disappeared. This may be intentional but I thought I would let you guys know.

How to reproduce

Seed: -4740166656945987943
Coordinates: /execute in minecraft:overworld run tp @s -1102.80 -54.00 1159.57 167.10 25.50