Async seems to create an additional ",," added to the transcript

[danaharon]

daharon-macpro:speech daharon$ node recognize.js sync ./resources/audio.raw -e LINEAR16 -r 16000
Transcription: how old is the Brooklyn Bridge
daharon-macpro:speech daharon$ node recognize.js async ./resources/audio.raw -e LINEAR16 -r 16000
Transcription: how old is the Brooklyn Bridge,,
daharon-macpro:speech daharon$ node recognize.js async ./resources/audio.raw -e LINEAR16 -r 16000
Transcription: how old is the Brooklyn Bridge,,