[Mikrotik follow-up needed] Since you're at PHBbb 3.1.9, please add ATOM feeds

Normis mentioned PHPBB 3.1.9 is used: http://forum.mikrotik.com/t/why-are-bbcode-code-blocks-inserting-a-space-at-the-start/97809/1

Since that supports ATOM feeds, please enable those as it makes it way easier to track threads.

More information is at https://www.phpbb.com/support/docs/en/3.1/kb/article/faq-phpbb-atom-feeds/

–jeroen