The issue seems to affect some users who change the time on their phone manually or change time zones when traveling, an Apple Support page said. The company recommends users who experience the issue restart their iPhone and then go to settings, general and then date & time to ensure the "set automatically" option is enabled.
If that doesn't fix the issue, Apple recommends users reach out to Apple Support. It's unclear what is causing the apparent issue. Apple said it "is aware of this issue and is investigating the cause and a solution."
The 6s and 6s Plus are Apple's newest iPhones. While the phones look similar to their large predecessors, Apple made several key additions that change how iPhone users can interact with their devices.
New gestures made through "3D Touch," allow the devices to distinguish between a quick tap and a long press, opening up a new way to give commands and unlock shortcuts to the actions a user takes most often. The new iPhones also have a faster 64-bit A9 processor and a sharper camera.
While the phones will keep their existing sizes, the company also introduced a new kind of "strongest" glass on the screen, along with four colors, including the new rose gold aluminum finish.
Another feature called "Live Photos," allows details in the photos to move, such as a moving waterfall with the sound of rushing water. Any photo can be pressed to get a short video, because the camera records 1.5 seconds of video before and after the picture is taken. A new icon on the camera status bar makes it easy to take Live Photos, just as you take traditional photos.