I am not aware of this but I'm not using a QR code and there is a warning
"[As QR] codes are not humanly readable, it opens an avenue for fraud," added ZenGo's Tal Be'ery.
This will cast a bad light in using QR code for now on because it is not readable, there is no way to know if the code is real of from a different address, I will not advise people to stop using it, but they know that something like this exists and they have to take extra precaution when dealing with QR code.
You can't encourage people to stop using QR code , instead encourage them to use only the QR code from the trusted provider ... not from a random free websites, it must be well known provider/generator so whenever there's something wrong you can take something further.
It's not secret anymore, it's not surprised ... your data is never safe online. Instead blaming the tool or something else, how about to level up your personal ability to defend your own data in this digital era? in this interrelated computing era? It's inevitable that you are at risk once you get connected to internet, once you get connected with other devices.
QR code is fine , the users not .