While moving the camera during battle, sometimes some blocks will be culled when they shouldn't (this basically leads to an x-ray glitch, which players can then abuse).

I'm not exactly sure what precise movement I was doing to achieve those, but it occurred 3 times in a row while doing simple movements, like spinning around the camera.

Screenshots here: https://gyazo.com/58621bac6e39fc41b569dd3c080316c1

IMPORTANT NOTE: This glitch effect remains ***after*** the battle, also. The only way to fix it is to change chunk render distance to a different value, and then back again, which will refresh chunk rendering.

I've tried a few times, but I cannot reproduce this. Is there a specific set of steps for making this happen, and are you running any other mods? I've seen a similar issue from Optifine way back when, something related to the chunk loading settings in that. Servers may also cause similar issues if things aren't loading in right.

Thanks for the report.

Closing due to age. If you still need any help, please make a new ticket!