Turns out there were 2 bugs
- infinite loading on group activity posts and mentions pages were broken
- footer wasn’t handled on most of the groups pages (let me know if I missed one)
Both are now fixed 
https://github.com/discourse/discourse/commit/4f945abba2821ddc79a7271f974716c7869160ac
https://github.com/discourse/discourse/commit/bfbdee6a576c3e87dd46d484794ccaeee676ba5a