I think I have seen that before and I also think we have captured that in a bugzilla entry. Unfortunately a) I can't find that entry and b) so far I think no one was able to reliably reproduce the issue so that a fix can be developed. I just to follow your steps from above on master (which is RHQ 4.10 +) and Safari and did not run into this.
What browser are you using?
I also remember such a BZ and I just faced this issue this morning, but no idea on how to reproduce consistently...
I use FireFox 24.