Touch ID disabled after screen replacement

So we got our iphone 6 Plus screen replaced to a third party screen, they used the original Home button but it still gives an Touch ID error. Is this suppose to happen when you use a third party screen?

The iphone is on iOS 10.1 and we would like to stay there so we don´t want to try a itunes restore unless we are sure that it will fix the problem, and as far as we have understood it probably won´t fix the problem anyway?

The long flex cable that runs along the shield plate and which connects the home button to the motherboard maybe did got a tiny kink near the lower connector which wasn´t there before, so could that cable throw this touch ID error? And would it help to install a new third party flex cable in that case, or does it also needs to be the original flex cable in order for Touch ID to work, just like the home button needs to be the original one?

The strange thing is that we earlier got a iphone 6 screen replacement and it also got the touch ID error. So exact same job and exact same problem on 2 different iphones. And on that iphone we are pretty sure that the flex cable or the home button wasn´t damaged.

So what are we missing here, which are the different things that can give the Toch ID error after a screen replacement? I thought Apple fixed the "error 53" thing that occurred after screen replacements in early 2016 and which disabled the touch ID?

As i said earlier this phone is on iOS 10.1, and so were the other iphone 6 which also got the toch ID problem. iOS 10.1 was released in October 2016 so as far as i have understood the error 53 thing was already fixed by that time?

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