false temperature bugs issue

I am using an iPhone 15 Pro, and since updating to iOS 27, I have been experiencing serious issues. The phone sometimes shows a “temperature too high” warning even though the device feels completely cool. At the same time, mobile network signals disappear, Wi-Fi disconnects, and all connections stop working. On one occasion, the entire screen also went completely black, and for a short time everything was disconnected, including mobile service and other functions. These problems did not occur before the iOS 27 update. Please investigate whether this is a software, sensor, or connectivity issue and provide a permanent solution.