Apple is blaming a software bug and other issues tied to popular apps such as Instagram and Uber for causing its recently released iPhone 15 models to heat up and spark complaints about becoming too hot to handle. The Cupertino, California, company said Saturday that it is working on an update to the iOS17 system that powers the iPhone 15 lineup to prevent the devices from becoming uncomfortably hot. In a short statement provided to The Associated Press, the company didn't specify the timeline for its software fix. Apple says it's also working with the apps that have been causing problems, saying Instagram modified its app for iPhones this week.