APM - choose a policy branch based on a checkbox status on login page

I had the same requirement. I added a checkbox and an expr. The checkbox is on logonpage and starts password reset workflow. This flow only works if I leave user/password empty => check the box and click logon If I enter a bad user and or bad password and get access denied and back to the logon page the reset password flow does not work anymore, meaning if I check the box (I forgot my password) and click logon then flow resumes the logon attempts and bypasses the expr branch. I guess I'll have to add some javascript to reset the logonpage when this checkbox is checked. Anyone with a better solution?