The function incomingPushResult(channelManager:channelUUID:pushPayload:) not called when server send PTT notification successful.

I see the log in my server and they told that PTT notification sent successful but bellow function not call from my app. Could you give me any suggest?

func incomingPushResult(channelManager: PTChannelManager, channelUUID: UUID, pushPayload: [String: Any]) -> PTPushResult
The function incomingPushResult(channelManager:channelUUID:pushPayload:) not called when server send PTT notification successful.
 
 
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