Seems that it has no handling for lack of microphone.
bundle.js:7668 Unhandled rejection NotFoundError: Requested device not found (No stack trace)From previous event: at promiseMic (https://v6p9d9t4.ssl.hwcdn.net/html/1116271/oooOOoo/bundle.js:44845:12) at Object.promiseVolumeTracker (https://v6p9d9t4.ssl.hwcdn.net/html/1116271/oooOOoo/bundle.js:44923:12) at Object.13../Alley.json (https://v6p9d9t4.ssl.hwcdn.net/html/1116271/oooOOoo/bundle.js:5260:16) at s (https://v6p9d9t4.ssl.hwcdn.net/html/1116271/oooOOoo/bundle.js:1:254) at e (https://v6p9d9t4.ssl.hwcdn.net/html/1116271/oooOOoo/bundle.js:1:425) at https://v6p9d9t4.ssl.hwcdn.net/html/1116271/oooOOoo/bundle.js:1:443
printWarning @ bundle.js:7668