I got previously exchanged an original cable under warranty from Apple and this is also broke down after a further six months. It seems as if the cable - whether original or forgery - each not aligned to a longer life. 6 months appear to be the maximum service life for me. Annoying!
I complained about it, because in the first six months the burden of proof as to whether the goods the error that had caused the damage now, already existed from the beginning, from the seller.
Will write, if I've got a spare!