Okay, the bug is reproducable at least on my computer and on my FSO installation.
Shortly after the marine transport undocks the Legion, the destroyer starts to rotate most strangely.
The center of motion is probably the docking bay used by the Argo class transport, and the destroyer starts jerkily rotating that spot in a plane.
If you happen to be outside thoe Orion's rotations reach, nothing else happens and you get to jump out without further problems, but at the first time the Orion hit me to the kingdom come.
I don't know what causes this, but I would bet it's something related to docking (or undocking)... is anyone else getting same problem?