I am using Linphone lib on iOS (and Flexisip on the server) to create a voip application on iOS.
Everything works well. Only when the mobile application is in the background and has an incoming call, my SOMETIME application does not work (it does not wake up and does not receive an incoming call).
On an incoming call, the Flexisip server will request APNS to send notifications to the destination mobile application. My mobile app will use PushKit to receive and process this notification (as shown on the incoming call screen)
However, sometimes it does not work.
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