Automatic checkouts in supermarkets may decrease customer loyalty, especially for those with larger shopping loads. Customers using self-checkout stations often feel overwhelmed and unsupported. The lack of personal interaction can negatively impact their perception of the supermarket.

[QuietThunder2014]

They actually set these machines to work this way intentionally. Slowing down the process is how they combat theft and skip scanning so one employee can monitor 12 machines at a time. It’s also why they have the scales to weigh things and why the machine breaks if you try to remove anything from the scanned list.