Does rocket chat admin password ever change without any external triggers?

Our rocket chat server has been deployed for around 6 months and we have never changed the admin password. However just last week we found that our servers that performs admin operations starts failing, and upon checking we found that it is because the admin password has been changed to totally different one. As it is encrypted using bcrypt we couldn’t figure out what it has changed to so we decided to just change it to a brand new password.

Question is, is there any functionality that automatically resets the admin password, for example every 6 months, or did someone hacked into our rocket chat server and changed the password? Or is it due to our servers performing some operation which failed too many times and triggered a password reset?

Thanks, just trying to find out what could have happened so we can prevent this from happening again and also for a peace of mind.