Just in the last day Apple Pay on my device (iPhone 6s+, iOS 9.3.2, T-Mobile) stopped working in just Walgreens. Two days ago there was no problem, yesterday evening I was unable to make a purchase at Walgreens. I tested a few different things. I was able to make a purchase this morning at a bike store. I then tried Walgreens again and it came up Not Authorized. The bike store it acted like a credit card, asking for a signature, whereas Walgreens it asks for my debit pin. I tried a different Walgreens later today and had the same problem; however, immediate after I tried a Rite Aid (with a debit pin) and had no issue. I thought for a moment it might be because of lack of service signal in the Walgreens, but I lacked service in Rite Aid as well and there wasn't an issue. If it was one location, that might make sense, but it seems like any location, and it's clearly not just my phone. Is there something I have to reset? Is this happening to anyone else?