TTS *and* Speech Input Simultaneously?

I noticed that as soon as a voice recognition activity starts, text-to-speech output stops. I understand the rational: TTS output could be 'heard' by the voice recognition engine a

Solution 1:

Must the activity simultaneously use recognition and TTS? If the recognition can wait (functionally speaking), force the event to spawn the RecognizerIntent only onUtteranceCompleted

This is pure speculation, but there must be some common feature that can only be used by TTS and recognition one at a time (both apis come from android.speech.*)