Update and solution.
I played with other contents in the container with the same bug. Also a new created database with only one container field showed the this problem. On the iPad 2 from my wife all works fine. After a restart of my New iPad (3) I can now open the content of the container field. I have no idea whats happend. Perhaps a cache problem in IOS. If an admin read the post send it to the FM Go team please.