[ubuntu] Arkose, Google-Chrome and Global menu problem

Hello,

I am trying to sandbox google chrome with arkose, but no matter which options I pass to arkose, I can not get the global menu working. What could cause this issue? Also other applications like Gimp do not have a global menu, although they have at least a local menu (which Chrome does not show).
What can be done in order to get the menus working? (I know using Arkose for Chrome might not be necessary on Ubuntu and I am also aware of the fact, that LXC is not the safest way of sandboxing applications, though I believe it might get more secure in the future).

Thank you in advance