no touch after iOS 11 update only with the Display from fixit 6s 6sP

At the moment we have a big problem with the Display from ifixit on iPhone 6s. The touch stops working after an update on iOS 11. We need to replace the Displays of some customers that already updated on iOS 11. Anyone with same experience? We informed every customers, who got an ifixit Display for iPhone 6s and 6s Plus. We tested the Displays of ifixit on several versions of iOS including the latest beta before we started our exchange program. The touch is still not working. We even tested the replacement of the chipset on the Display. We replaced it with a chipset from an original unit, but the LCD and Touch are not compatible with original Chipset. Apple did an update on their drivers. But I´m really wondering that this mess with the touch occurs only with the Display for iPhone 6s and Plus. We only order Displays from ifixit, to to ride out a short until the Display from our other supplier arrive from China. This supplier supplies us with aftermarket and refurbished Displays. Both units work on iOS 11. Do you have the same experience? Will ifixit start an exchange program for iPhone 6s? And I´m really wondering that ifixit did not inform its pro members. This is a very poor B2B support. We contact the eustore, but we got no answers since 3 days.?! This is just not okay. They don´t have a telephone number just an email support where nobody answers.