Electrue part only fit Electrue parts. I recall the half moon ends on those.
Qtex ones will swap with genuine, and we have never had an issue with them or had anyone complain about them. Had an issue existed with them generally, I would have brought it up with the MD of Qtex and he would have fixed it as its such a fast moving line and he is responsive to feedback.
Sounds to me like you had a dodgy one or a second. Unless you saw something I never did.