The problem does not show up if you use a WAV file. It only happens when the microphone is recording the audio. It detects finished speech before the end of the sentence. If you change the #ifdef switch in the sample app so that it is using the live mic, and play the audio file from another device, or simply say the sentence, you’ll see the problems.
When I zipped the sample app, it was set to use the WAV file (sorry for the confusion).