This happens ehen you have to go meet the Exchange boss in the toxic bar; you cannot deviate and go into any other modules.
But I didn't see that animation when the boss of exchange invites me there, even Atton did not fight with that twins---I fight with that thugs in my ship and after that I've killed thier boss it takes me out of the Ebon Hawk with Bao-Dur and that's it. I can't go to Jek' Jek' Tar