Jaws open downward
Every jaw used to open upward. A roar, a bite or a cry now drops the chin.
A creature with a jaw bone opened its mouth the wrong way round: the roar, the bite, the magic cast, the victory cheer and the talking chatter all swung the chin up into the upper jaw. It went unnoticed because the preview and the bake agreed with each other perfectly.
Every one of those clips now drops the chin. Creatures with a jaw pick up the fix on their next bake.