Comment by kevinwang

I wonder if this, or something like it, is the issue:

> 32-bit XorShift should usually not be used to produce 32-bit numbers, because it only produces each number once, and never produces zero.

(From this page I found while trying to see if this was a common flaw in PRNGs: https://www.pcg-random.org/other-rngs.html )