Continuing the discussion from My Cr Otter Scanner's touch panel does not work!:
Same here, it’s very hard to start / stop the scan with the button on the scanner. Very often I have to use the App on my PC to do that.
I complained about the issue with the seller and they replaced the scanner with a new one. But this one has the same issue with using the stop / start button on the scanner, though it works a little better then the previous one.