Encountering the same problem here. When I used the transponder with the companion(while my char was downed) the game was stuck loading after the cutscene forever(tried twice). No crash though.

The game simply crashes at about 30% loading if I use it when both are alive. The one time I used DX11, it crashed at the loading screen(after using transponder) too. I am playing on my laptop at potato settings, originally thought it was a problem related to that.