Minecraft crash while flying upward.

Minecraft crashes while flying upward and looking down.
i am not sure why but i had a big render distance set to test the updated chunk rendering.

Steps to Reproduce:
big renderdistance worked for me 28+
after that i was looking around me a little bit and saw the first chunks loading (pretty smooth)
after that i flew up while just looking at the horizon and later i started looking down and then i crashed.

this happened two out of two tries.

i've included crash reports for both tries