While recording in background, audio playback quality loss when using Carplay

Our app uses playAndRecord category with options of interruptSpokenAudioAndMixWithOthers, allowBluetoothA2DP, allowAirPlay & defaultToSpeaker, and while backgrounded, Spotify or other music apps play normally when the iPhone is not connected to anything or is connected to Bluetooth. However, once iPhone is connected to CarPlay either via Bluetooth or via USB cable, the music apps' playback quality become flat which suggests the recording is using the Hands Free Profile (which would also happen if allowBluetooth is set and connected to Bluetooth devices) - is there any way to keep using the iPhone microphone to record while connected to CarPlay so that we can allow music apps to play normally?