Kuala Lampur, June 28 -- Most people are aware there are some important issues and problems related to QR code payments. These include: security and fraud risks, code interoperability, merchant confusion, refunds, transaction fees, limited adoption, etc.

However, there is a less critical but (potentially) no less annoying one.

I was standing in line at a nasi kandar shop, waiting for my turn to pay. There were only two other customers in front of me, so I didn't envision a long wait.

But then three minutes became five minutes then eight became 10 until not just me but the patrons behind me were like, okay, what on earth is happening?

Then lo and behold, we found out the reason for the delay: It appears one of the folks in front of me ...