On our new firework products, there are QR codes located next to barcodes. The clover system will scan the QR code. We suffered an estimated loss of $28k due to this issue. When the item is scanned it sound like the item was rung up when in fact it was not and only a very small brief error message at the bottom of the screen appears. We had no idea that clover unit could scan QR codes, and this issue was not discovered until after our season was closed. My suggestion is that clover needs to push a system wide update that when a QR code is scanned a large error message that will not disappear, appears.