Galaxy S4, b15

Hold device up so in portrait mode. Lay or hold the device flat. Click settings button, scan barcode. Click Back button to cancel. Screen does not rotate back to portrait mode from Landscape unless you're holding the device where it's oriented in portrait mode. Only an issue if screen rotation is not locked.

Other: Upon clicking the back button from the scan, a red message is briefly displayed that the rear-facing camera is not available.