Nonsense - the 320 flaps run out on mechanical screw jacks, connected to flap tracks runners connected to the wing PS with actuators that drive all gears through a common drive shaft
the only way to get asy' flap extension is to remove the flap track stops or disable a drive shaft: either option will trigger an ECAM warning, and have specific handling characteristics
secondly, it doesn't explain the rapid (as reported) pitch oscillation
Moderated:
Keep it pleasant please.
Duck