Amazon's checkout-free physical shop 'can't cope with more than 20 people'

Official opening of Amazon Go store delayed after camera and sensor technology found wanting in beta testing

Amazon's cashier-less grocery shop, dubbed Amazon Go by the company, is going through some teething problems, according to the Wall Street Journal.

Specifically, the new shop can't handle tracking more than about 20 people at the same time, and freaks out "if an item has been moved from its specific spot on the shelf" the paper writes, citing un-named sources.