I am thinking they put in a weaker door pop actuator
I'm thinking the "actuator" is just the pressure of the rubber door seals, upon release it nudges out a bit, but the force from the door seals isn't enough in the back. My particular door seals weren't even stuck properly to the door with their adhesive until I pressed them on.
I'm going to experiment with some sponges and stuff in the door jamb, just to see if it makes a difference. (No, I won't consider a sponge a solution, but it'll help determine what's going on, especially if the window stops doing its little dance.)