We have a demo project (ver 188.8.131.52) using the ZXING.NET.Mobile scanning PDF417 barcodes running on a Samsung Note 3. It works reasonable well in the Horizontal orientation but when rotating the phone vertically, the scanning stops working. It may occasionally decode one barcode, but its basically unusable. I can see the camera focusing on the barcode and acquiring the image, but then it does decode in Vertical orientation as it does in Horizontal.
I see in the older version 184.108.40.206 a reviewer stated "This would be a 5 star review if the scanner could scan Vertically and not only horizontally."
Since the Android version of ZXING from the app store works in both orientations, I would think it should work in Xamarin.
Has anybody else seen and resolved this issue?