Early Monday, an Amazon Web Services outage disrupted banks, games, and Peloton classes. Eight Sleep customers faced a different problem. Their internet-enabled mattresses malfunctioned. People woke to beds locked in upright positions, excessive heat, flashing lights, and unexpected alarms. Matteo Franceschetti, the company’s chief executive, apologized and said engineers were building an outage-proof mode. By Monday evening, all devices functioned again, though some experienced data processing delays. The mattresses adjust temperature between 55 and 110 degrees and elevate bodies into different positions. They activate soundscapes and vibrational alarms. The advanced models cost over $5,000. A yearly subscription of $199 to $399 is required for temperature controls.