Extremely large lakes, almost "oceans" generate in single biome worlds with the new terrain generator

Extremely large, over several thousand block large lakes, almost "oceans" generate in single biome worlds with the new terrain generator. I think those lakes look quite cool, but I don't think they are supposed do be that large.
I found this while testing MC-192055. Then, I tried another world and I spawned next to a 1000 blocks long lake.

Steps to reproduce:

1. Create a new single biome world
2. Fly around, you may not always spawn next to it
3. Here it is.