In my experience, password reset tokens are not single use. They are good for both loading the form and submitting the form. They are not invalidated until the form is submitted with the new password.
They are good for 1 password reset, not 1 page load. It's possible to make them good for 1 page load, but most I've encountered are not due to the tradeoffs that would involve (see other discussions).
They are good for 1 password reset, not 1 page load. It's possible to make them good for 1 page load, but most I've encountered are not due to the tradeoffs that would involve (see other discussions).