Rho Elements Scanner stops returning data

We are using the default scanning sample application from your website (http://docs.rhomobile.com/rhoelements/rhoelements2-webapps) and when we are scanning the attached bar codes, not all the data is returned.  For instance, scan one bar code and you see the type and then the value.  Scan a different bar code to get another type and value.  As you keep scanning the different bar codes, the application stops returning the information at different intervals, even though the scanner still turns on, and beeps an acknowledgement to the bar code read.