Hello, currently, Our App si blocking while we call a another view controller or SDK or Camera System and before we execute the next code. while (procesando)    {     NSDate* loopUntil = [NSDate dateWithTimeIntervalSinceNow: 0.1];     [[NSRunLoop currentRunLoop] runUntilDate: loopUntil];    } This code, allow us to wait the result of the second view controller or sdk or process. Our production App run this code for some process of the App, we know that is no the best solution, instead we should use completions or another approach but was working as normal long time. The big problem is that just generates problem with an iPhone 12 with ios15, with other devices with iOS 15 doesnt have problems It looks a problem with iOS 15 for iPhone 12. Im waiting for a workaround or maybe for a solution with a new vertion of iOS Greetings