The problem does not appear if I build for release

The Problem was a Timer in which some Actions with an Animation were executed. I solved the Problem by checking at the beginning of the timer, if the app is Active: .onReceive(NotificationCenter.default.publisher(for: UIApplication.didEnterBackgroundNotification)) { _ in data.isAppActive = false } .onReceive(NotificationCenter.default.publisher(for: UIApplication.didBecomeActiveNotification)) { _ in data.isAppActive = true } Timer.scheduledTimer(withTimeInterval: 0.2, repeats: true) { (_) in guard data.isAppActive else { return } ... }