Nor should they be, as far as Poe was concerned. That Rex's foremost concern was 622 was actually something that spoke far more deeply to Poe than if the man had been concerned about him. So he took the message easily enough, picking up his pace in order to let the troopers fall a couple steps behind them, as Poe addressed a low question to BB-8.

BB-8 informed him, just as quietly, that he had not seen either Hux or Kylo, but that he could continue to keep a vigilant eye out for them. Poe rubbed the droid's head in a silent thank you.