See my other answer. Also found this one: https://stackoverflow.com/questions/11642926/stop-close-webcam-stream-which-is-opened-by-navigator-mediadevices-getusermedia
Gives you some more hints on how you might achieve this.
Regards,
Ronald
The widget explicitly has a check that stops it from detecting a scan after the first one:
So currently, I think you’d need to close and open the scanner for each scan you do. That could be part of the onDetect action. You could also consider: