Strange chunk loading glitch

During exploration of a world created in 21w06a, where I generated new chunks to check out the updated caves, I encountered this very strange very strange chunk loading issue: https://youtu.be/fwCgojp4ZRQ.

Interestingly enough, the issue fixed itself upon leaving and rejoining the world.

I cannot seem to replicate the issue any more. I have attached latest.log, if that helps.