Valkyrie's pushbar is in fact still attached. I've solo-carried it around by the tail and it's still doing okay.
Keres, on the other hand, is 2 for 2 on broken pushbars. The first was from some overzealous pusher stoppage, but the second break you can blame on a high and narrow wheelbase; she rarely made it through the chute with more than two wheels touching the ground () and didn't survive my fat ass trying to get caped. Seriously, I still can't get over how I managed to flip a buggy at capes.
Oh, letting Rem get inside wasn't the best idea as far as buggy health, either, though I'll admit I only let it happen because Keres was retired anyway. But now the axles are bent, on top of everything else. Thanks, Rem!