Expired Password Page in Usermin Redirects to login

SYSTEM INFORMATION
OS type and version Ubuntu 22.04.5
Webmin version 2.510
Usermin version 2.400

An interesting issue with Password Expiry enabled. Usermin is configured to prompt the users after they log in to change their password, as it has expired.
The page which appears asks for the old password and has two other inputs for new/verify password.
For an unknown reason, when the user logs in they may see this page for a second, then usermin redirects them back to the login form at “/session_login.cgi” immediately. They are not able to then update their password.

The only way I can get them back into their usermin is by going and manually resetting the password for them. At which point they don’t need to see the expired password prompt and can just log in as normal.

My question is, why is the password expired prompt page auto-redirecting and how do I make it stop so the users can reset their own passwords?

Thanks much for your time.

Maybe I should ask, where do I start looking to figure this out myself?
Is this a dangling header sent by Perl? Some javascript or HTML thing?

It happens so fast that I can’t really tell what causes it.

Some testing has shown that the page -may- remain open the very first time the page is shown. If the user reloads the page or their session times out and they have to log in again, the page will start immediately redirecting.

Additionally, is there a way I can manually expire the password of a singular account? I’d like to do more testing without needing to change the settings back and forth that impact everyone.
Thanks.

Where should I post this to get some input on the issue? Am I required to make a github account to ask about or report this?

Is there a way I can pay for a singular support ticket here without paying for a pro license?