I built a barcode scanner that runs fine on my Galaxy Note 8, but on my classroom iPad (4th Gen) with iOS 10.3.3 installed. I'm hitting a bug I think. My app is designed to scan/enter two seperate barcodes into two separate text input controls before I patch them. Both scans are triggered by two separate buttons. The bug always occurs on my 2nd scan, the iPad loses its autofocus and I can't scan a rather long barcode. Autofocus always works on the first scan, regardless of which button is pressed, but then it stops working afterwards.