I have US unlocked U1 version, directly purchased from Samsung web site. I update VZW-F721U1UEU1AVIA by Odin. I have no issue after upgrade.
Not sure what is the different between F721BXXU1AVIF, probably vendor specific.
BTW, I am using US Mobile which is VZW MVNO.
I don't think it has nothing to do with the new firmware update. It has to do with Google Pay last update. I had this problem two weeks ago, but was fixed quickly in a later update See if there is an update to your Google Wallet app.