didReceiveRemoteNotification not called in iOS 13.4 when app is in background

My app uses remote push notification. The push notification is received, but with iOS 13.4 the method application(_:didReceiveRemoteNotification:fetchCompletionHandler:) is not called when the app is in the background. If the app is in the foreground or using an iOS 12 device the method is called. And the method invocation in the background stopped all of a sudden. Up until 15minutes ago, the method was being invoked even in iOS 13.4.