A bug: rocket will disappear when RPG is on either player or AI's back

[msy 22]

It is an old bug but last CIT was rejected due to condidering it happens only on player. But the follow video will show the rocket can also disappear when the RPG is on AI's back. To save your time you can jump to 0:49.

http://www.youtube.com/watch?v=A_A63dBq9MI

And the rejected CIT is here. I think it is a bug if it can be resolved at 1.61 beta.

http://dev-heaven.net/issues/14884