bincode 1.3.3 is fine
bincode2 (forked) is fine

first value is original,
second is bind code 1.3.3 or bincode2,
third is bincode v.2

the third value can output NaN sometimes.

I tried different settings in the config. and I tried to serialize my own struct of floats, and it works.
no idea why it doesn't work for glam::Vec3

serde is latest version, tried with multiple versions.
serde has field default-features = false

serde::encode_to_vec
serde::decode_from_slice

are side to side and there are no other factors involved