Note: you don't have to do this in the store. You can buy your stuff as usual, scan it at home where you may have better connectivity, and then revise your shopping list for next time.

If you get a hit on Choco-bits at home, then you know that you also won't be buying Fruti-bits, as they're both made by Sulfur Industries. I don't think you need to go slowly down the aisle scanning everything with a bad connection.