I think there are a few potential reasons why the user may not be getting logged out after resetting their password using the forget password module in Mendix. Here are some steps you can take to troubleshoot the issue:
Check the app's microflow logic: Review the microflows used to handle user authentication and password reset, and ensure that the correct logic is in place to log the user out after a password reset. If you're not sure where to start, you can try looking for the "Logout" microflow action and see if it's being triggered correctly.
Check session handling: Review the app's session handling logic, and ensure that sessions are being cleared properly when the user logs out or resets their password. If sessions are not being cleared correctly, the user may still be logged in even after resetting their password.