Current MC version: 1.16.5
C&B version: 0.3.4
Optifine: No

I'm making houses on a superflat [overworld] and it keeps crashing when I place more types of blocks [i.e. i can't place wool bits when there's already 15 other different blocks on there. doesn't matter on the amount of those 15 blocks]

Simple crash report: The game crashed whilst unexpected error
Error: java.lang.StackOverflowError: Unexpected error
Exit Code: -1

crash-2021-05-09_15.45.40-client.txt

I have tried allocating more memory to it, and I'm running two games at once since the world with the bits is supposed to be a replica of another world. It is possible that the other instance is eating the memory, but I've yet to try that out.

Fixed in the latest beta

Oeps that is a bug.

Sadly not something I can fix immediately.
I was able to reproduce it though.

At the moment c&b is undergoing a massive rebuild of it's internals including this logic.
This update should take care of all of this.

Tried it with only one game running, and it still crashes.

Tried it out with only one of different bits [meaning, one block of different bits], and found the max of different blocks I can place on there without it crashing is 15. Is there a way to change this?