I've got a custom build running right now which was used to solve another issue, and this is now working. I also have a post about this:
https://portal.smartertools.com/community/a89095/bug-chrome-doesnt-auto-suggest-email-address-on-login-page.aspx
So it's just Chrome that it doesn't work for in the latest public release. Given that my custom build has fixed the Chrome issue my guess is that this week's public release will have the fix as well.