No more Whole Foods discount unless you have the app installed while shopping?

A few weeks back, that stopped being the case. Someone in the store showed me a way to find the QR code. But that means is now also gone. So I installed the Whole Foods app and took a screenshot of the QR code. When doing so, I get a message along the lines of "For your security, an screenshot of the QR code will not work". I am going to try it anyway. Not sure what I'll do if it doesn't work. I'd rather not have Amazon track me while shopping.