Apple is working on a software fix following reports that some of its new iPhone 15 models are overheating.

The company told CNN the current overheating issues are not a safety risk and will not affect the long-term performance of impacted iPhone models. It also emphasized that iPhones have internal protections for components to help regulate the temperature if it gets too high.

Apple also told CNN there are several circumstances that are causing its next-generation lineup to heat up. User complaints started to circulate after the latest iPhones hit stores on September 22.

“We have identified a few conditions which can cause iPhone to run warmer than expected,” Apple told CNN in a statement.

To start, overheating can occur with some recently updated third-party apps, causing them to “overload the system,” the company said. Those apps include Instagram, Uber and arcade racing game Asphalt 9.

“We’re working with these app developers on fixes that are in the process of rolling out,” Apple said in a statement.

It also said it discovered a bug in iOS 17 impacting some users, and plans to roll out a software update to address the issue. It did not comment on when the fix will be made available.

In addition, Apple said the device may feel warmer during the first few days after setting up or restoring the device because of “increased background activity.”

Apple’s support page warns users that a device can get hotter when restoring it from a backup, using graphic-intensive apps, streaming high-quality video, and charging it wirelessly.

“These conditions are normal, and your device will return to a regular temperature when the process is complete or when you finish your activity,” the company states on the website. “If your device doesn’t display a temperature warning, you can keep using your device.”