Chunks Render incorrectly in the Nether

This looks like a chunk error, did you change the seed of the world in any way, or at any point use any mods or third party tools on it? If not, please provide seed and coordinates.

I did not change anything, it was a flat world and the seed is 6309439981061290656 and the coords are 4 40 -376

I am unable to reproduce this, if you opened the world during the 1.16 snapshots and Prereleases, your seed may have been corrupted.