Chosen Solution
Having started with iPad mini screen replacements, I’ve noticed I’m losing the Smart Cover sleep function after digitiser replacement. I’m told by my supplier only genuine Apple digitisers have this IC chip (located near where the flex cables are for the digitiser) Is this true?
I could see those cheap iPad screen would have issues with the sleep/wake sensors. I’ve used iPad mini screens from ifixit and never had an issue with the sensor not working. So thinking a quality issue with your screens.