Your Mac could be storing your Disk encryption password in the System Log!!! (Password Bug #3)

Previously,
Bug#1 -  Mac used your password as your password hint.

Bug#2 - Trying to logon as root with a blank root password would inadvertently enable the root account, and leave it enabled with no password

https://nakedsecurity.sophos.com/2018/03/28/yet-another-apple-password-leak-how-to-avoid-it/