Today I've started seeing something like this at the top of the feed when I click on one of the forum links on the sidebar from my Network page:
This appears to be the banner that would normally appear in the sidebar of a user page, but rendered as a post and set to view height for some reason. It is rather annoying, since I have to scroll down to see actual posts from the forum. Is this a result of some change that was applied recently? A configuration change on my end? Perhaps a bug in Friendica?