[curt.clifton]

I suspect you're running into the fact that items in the actual In Box in planning mode do not appear in context mode at all.

Until an item has been moved from the Inbox into a project (or single action list), OF assumes you have not committed to doing it. If you haven't committed to doing it, then OF sensibly (to it) doesn't offer the action as something for you to do.

(Calling the No Context item in the sidebar an "in box" is likely to be confusing. Come to think of it, that the No Context icon looks like an in box might be part of the problem here. Maybe it should be a question mark?)