Hand Free Device Not Calling - Using Voice Search

Has anyone else run into an issue using a bluetooth hands free device that instead of calling, the phone searches what you say? I'm using a Moto Roadster 2, and when I press the button to make a voice command and say "Call Home," instead of calling home I get Google voice search results for "Call Home." I don't know why this happens. Sometimes the device makes the call and other times it thinks I want to search something. But if I do initiate the call on my phone, the speakerphone handles the rest. Any suggestions?

 

I'm not sure. Sometimes it works, no problem and other times it wants to search.