IOS 13.1 is being released on the 24th. So what is the big deal here ? For us the important part is that Apple fixes a lot of bugs in the NFC handling. On IOS 13 you will experience issues where the reading aborts in flight especially on some newer passports or if you have your phone in a case. Generally these issues are removed in 13.1 but since cases are pretty diverse no guarantees can be given for any and all permutations. If there are still problem it would be an idea to remove the casing and try again if you experience failures.