The 'Enter Forum' button doesn't appear on some of the forums on the mobile view

Hi
On this page – https://www.mytaz****.com/eight-stages-to-recovery/ of the site, when I’m checking on mobile view, the ‘Join Forum’ button (and on this page https://www.mytaz****.com/forums/, it’s ‘Enter Forum’:wink: doesn’t appear for alternating forums.

I’ve granted support access if its needed – hopefully some CSS can fix it?

Thanks
Farzan