An unprecedented Amazon Web Services outage that caused nearly 150 major sites and apps – including Snapchat, Venmo and Roblox – to go dark was apparently caused by a common tech glitch. The 15-hour outage appeared to be caused by an “underlying DNS issue,” Amazon Web Services said in a status tracker on its website.

The e-commerce giant has launched a new feature on its app called "Add to Delivery," a button that allows customers to add additional items to a delivery for an order that has already been placed.