System Automatically changing passwords

I just upgraded from 2019 to 2022 Advanced. We are having problems with multiple users having their password changed by the system, this has even been happening to our company account. We get the message below.

When I go to SY_USER the encrypted password is no longer the same as it was before, and we have to continuously reset the passwords.   This has happened 30 times in the last week.  Any Ideas?