[NativeDemo][iOS] when the peer disconnect by other or hangup, and call again the remote video never show up

Hi,
I has build up NativeDemo and work all fine at first time, that mean when the App first time start the video audio stream all fine, but if one of hangup the connect and try to call again, the remoteView show nothing.
I try to reset, like alloc new or reset still doesn't work:

nativeHandler = [[OpenWebRTCNativeHandler alloc] initWithDelegate:self];
[nativeHandler setSelfView:self.selfView];
[nativeHandler setRemoteView:self.remoteView];

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- (IBAction)handupCallAction:(id)sender {
[nativeHandler terminateCall];
}

is there any suggestion?