I think this may have been reported before but perhaps not articulated specifically enough.
On the login page, when clicking into the Email box, Google Chrome does not auto-suggest anything so the user has to fully re-enter their email address every time. In Edge, Firefox, and IE the auto-suggest works per the screenshots below.
And Old Faithful
As a side-note, in Chrome when clicking into the Password box it does auto-suggest recently used passwords. But our users who have multiple email addresses (myself being one of them) report this as a pain.