When generating a password reset link, it will expire in 1 hour, not 24 hours, as the email template suggests it will.

Suggest either updating the text of the email templates, or changing the behaviour.

In mod.member_auth.php

line 1118 should be
return ee()->localize->now - (60 * 60 * 24); // 24 hours

(There is a typo on line 1114 too - "determining").