Mask allowing partially filled input to be submitted

[solis-eduardo]

Device

Ubuntu 20.04.2

Browser

Brave: 1.26.77 Chromium: 91.0.4472.164 (Versão oficial) 64 bits
Chrome: 92.0.4515.107 (Versão oficial) 64 bits

jsfiddle

https://jsfiddle.net/ozq6mvj7/

When trying to make a CPF mask, the '0' character doesn't require any filling on submit, while on the docs it is stated:
[...] '0': {pattern: /\d/}, '9': {pattern: /\d/, optional: true}, [...]. Shouldn't the plugin require a minlength on this case?