Unfortunately, I'm not able to reproduce it consistently. I have two apps with very similar architechture, with one I've never seen it, with the other for ~10% of deployments. I would to have 10 of these "problem apps" on the same AS7, it would be quite difficult the get them all up and running after a reboot etc :-/
There are other forum posts that also could indicate this issue, e.g. http://community.jboss.org/message/619685#619685