If your voice is not understood for any reason, the waze app just cancels the report and you miss your opportunity to mark a hazard at an accurate location. Instead, if it said "I didn't quite catch that, could you say again?" While retaining the original position marker... I could have another try to enunciate a little better or speak up a little louder to get the report through without having to scramble to try to throw down a manual marker at highway speeds.