Redirect after Get New Password button is used

[wentloc]

We found an instance, whether it was new or after the update to 5.2.3, that when a user clicks the Get New Password button in the lostpassword screen, that the user is redirected to ​https://wp-login.php/?checkemail=confirm. The email still comes in to the user, but is navigated away from the site. As a note, this is on a windows hosting (just because it makes it interesting sometimes). I modified line 568 of wp-login.php to

$redirect_to = ! empty( $_REQUEST['redirect_to'] ) ? $_REQUEST['redirect_to'] : site_url() . '/wp-login.php?checkemail=confirm';

I simply included the site_url() function and a forward slash.

[davidbaumwald]

Thanks for the ticket @wentloc! We're tracking this issue in #47980.