Steps to reproduce the issue

In Joomla prior to 3.9.0

Users: Options: Allow User Registration: Yes

Users: Options: New User Account Activation: Administrators

include {load_module mod_login} in an article

link a published menu module to a visible menu

publish a single article menu item for the article in the visible menu

create a hidden menu not linked to any menu module

publish a menu item alias menu item for the single article menu item in the hidden menu

publish a users registration form menu item with the menu item alias menu item as owner

set all the above menu items Metadata Security = Yes

note that registration links emailed to users and administrators honour the security setting by using https:

upgrade to Joomla 3.9.0

note that registration links emailed to users and administrators do not honour the security settings but use http:

Expected result

registration links emailed to users and administrators honour the security setting by using https: even after upgrade to 3.9.0

Actual result

that registration links emailed to users and administrators do not honour the security settings but use http: after upgrade to 3.9.0

System information (as much as possible)

PHP Built On Linux web31.fasteurohosting.com 2.6.32-896.16.1.lve1.4.54.el6.x86_64 #1 SMP Wed May 2 07:43:19 EDT 2018 x86_64
Database Type mysql
Database Version 5.6.41-log
Database Collation latin1_swedish_ci
Database Connection Collation utf8mb4_general_ci
PHP Version 7.2.11
Web Server LiteSpeed
WebServer to PHP Interface litespeed
Joomla! Version Joomla! 3.9.0 Stable [ Amani ] 30-October-2018 14:00 GMT
Joomla! Platform Version Joomla Platform 13.1.0 Stable [ Curiosity ] 24-Apr-2013 00:00 GMT
User Agent Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:63.0) Gecko/20100101 Firefox/63.0

Additional comments

Apparent regression

Thank you for your work