I'm confident that using the jump pack, the vampire leap, and the archon leap used to be amazing for rescuing colonists. However, at the moment, they are all dropping the rescued pawn before initiating the jump, which really isn't very useful.
Is this an intended change? Did I break something via a mod? The latter would be my own problem, of course :)
Best way to check would be to disable your mods and check it with a fresh tester embark. You can set it up via dev mode.