Minecraft v1.16.5
Forge v36.1.24
Nature's Compass v1.9.0

The top block displays as stone for every biome displayed, vanilla or modded.

Haven't been able to recreate this so far. Please try with only Nature's Compass installed and let me know if the issue persists, so we can figure out if it is a compatibility issue.

Ah, I'll try in a day or so. I also forgot to mention this was on a server. If it ends up being a compat issue, any idea on what could interfere with it?