Why is the "matches" option not working for cordova-plugin-speechrecognition?

Question

Problem: using the "Cordova Plugin for Speech Recognition" in an Android app, the startListening() function almost always returns 5 matches, despite setting matches: 1.

• matches is defined as: {Number} number of return matches (default 5)

For example:

• speaking: "What's up"
• returns: "what's up,whatsup,watsup,wat's up,what sup"

Question: how can I restrict the output to return just a single value/best match?

Sample code to illustrate how I have set the matches option:

function startRecognition(inputFieldId){
    window.plugins.speechRecognition.startListening(function(result){
        // Show the result in the corresponding input field     
        document.getElementById(inputFieldId).setAttribute("value", result);
    }, function(err)    {
        console.error(err);
    }, {
        language: "en-US", matches: 1, prompt: "", showPopup: false
    });
};

Note: modifying the other options, like prompt works fine, but modifying matches does nothing.