Issue with online instant bank transfers

There appears to be a new instant bank transfer process with HSBC which requires scanning a QR code from the mobile banking app. This is fine if you're trying to make the transfer from a laptop or other mobile device, but it's frustratingly useless if you're making the transfer from the same place your app is, I.e. your phone, which must be the majority of cases. Anything I'm missing here?? Or am I resigned to having to go via a card/PayPal etc (often incurring fees)...