It appears the media engine is unable to initialize the audio unit with iOS 16.4 when trying to initiate a VOIP call. The problem does not occur with iPhone 14 Pro but was reproducable with different devices, e.g. iPhone 8 Plus, iPhone 12 mini, iPhone 13. This problem does not occur with iOS 16.3. Debug : VoIP : BMEIntegration: [919][<NSThread: 0x2819ec840>{number = 15, name = (null)}][WebrtcMediaManager.cpp:133] [BmeLoggingCallback] bme:(RTCLogging.mm:35): (audio_device_ios.mm:354 StartAudioUnitIOS): StartAudioUnitIOS failed audio not initialised Is anybody else seeing this issue?