From my recall, I cannot seem to access the forum from the mobile versuon of the site. I can doe press the “View full site” button. I have also noticed that if you are at the forum, and then switch to mobile, you will view the forum in an odd but possible way.
My suggestion is that you add (if possible) a menu bar at the mobile site, so you can access the whole site.
Hey I’ve finally had a chance to dig into this and I’m finding that it’s a config issue with the basic wordpress mobile site (included with JetPack). The mobile site is showing the wrong base menu and it’s apparently more work than just changing a config to fix it.
I’ll post again when I get it working right. Thanks much for the bug report! 🙂