If you wonder why this sort of thing happens ... Friend of mine on a shoot was talking about manufacturing. He'd sent off designs for a particular electronic device his company want to sell. The Chinese manufacturer sent him what he specified. It was perfect. EXACTLY what had been designed. It was a meter of some sort to be used outside so needed to be pretty tough and reliable.

He put an order in for a 500 or so.

The whole lot was junk. As soon as the order was in the Chinese manufacturer cut every corner possible and then some in order to maximise their profit.

FX might have experienced something similar and not realised it until the models were out. Or alternatively the whole design was crap from the start.