A lake of water was generated on the surface of a lava lake (with water sources)

Summary:
On the lava lake, a mini-lake was generated from regular water (with full blocks of water).
Also in this water glow squid constantly spawn and die almost immediately.

Seed and coordinates:

Seed: -732078047
Coords: 4635.31 -21.02 3140.41 10 16

Steps to reproduce:

1. Create a world with the specified seed.
2. Set the specified coordinates.

Observed results:
On the surface of the lava lake, a mini lake with water (full of water sources) was generated.

Expected results:
No water sources should be generated on the surface of the lava lake (this does not apply to flowing water).

Image: