I have set up the board to be accessible both over http and https (using a self-signed sertificate), whichever is preferrable to a user.

HTTPS works fine, however, after logging in through log in form (https://www.fighting.ru/forum/ucp.php?mode=login), or after editing a post, users are still implicitly redirected to a http version, and have to manually change the link to get back to https.

While I understand that such configuration is somewhat an oddity, and that most would prefer to force https, I still think that phpbb forms should respect current protocol whichever it is.

https://www.phpbb.com/community/viewtopic.php?f=466&t=2405766