Hi,
Some QRcode scanner have a "feature" which check if the url is valid.
It means that the software will call the url it self, so the serial will be consumed before clicking on the link.
In android it can be the same, I know that the software "Barcode Scanner" can have this option (you can activate/deactivate it if you want).
It might be the same in iPhone/iPad.
With the next HikaSerial release (1.8.2) the consume part will have new feature to not confirm the serial automatically.
HikaSerial will display a confirmation page instead and the user have to click on the button to process the consumption.
The development is done ; we are making some tests before the release.
Regards,
Jerome - Obsidev.com
HikaMarket & HikaSerial developer / HikaShop core dev team.
Also helping the HikaShop support team when having some time or couldn't sleep.
By the way, do not send me private message, use the "contact us" form instead.