Rapidly scanning product barcode causes different item to show up

Hi Team,

When cashier rapidly scanning the barcode of single item, it is adding different item in the transaction. For eg. if cashier rapidly scan 810021240008 barcode for 10 times, 9 times same item(810021240008) is adding to the transaction but for 1 time different item is adding into the transaction(item_id = 40008 present in the DB). We added logger to see what scanner is actually scanning and we found out that scanned barcode is coming incorrect. Most of time scanner is scanning the correct barcode but some time it is scanning like 008, 40008, 8100212400 that is incorrect. We are