Testflight users getting inconsistent result from inapp purchase

I have written a very simple program to test out inapp purchase, with only one Buy button to buy a non-consumable.


When I tested the app through Testflight, I am getting inconsistent result from the users. So far, 5 have tested the exact same build, 3 are successful and 2 are getting the Purchase Failed Reason:Unknown error.


The 3 who are successful are using iOS version 13.4.1, 13.3.1 and 13.4

The 2 who are unsuccesful are using iOS version 13.3.1 and 12


For the 2 who are unsuccessful, they have done inapp purchase with other apps before.


Anyone has experienced this before? Any advice would be deeply appreciated.


Thanks!

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Clearly 13.4.x is your friend's friend.


Ignoring how you were able to find 3 casual testers on non-j'brkd devices using 3 iOSs, and 2 using 2, what version Xcode was used for the build?


>very simple program


Might be it's too simple? No error checking, version bias, conditional indicators may lead to your issues. Generic isn't always the best indicator.

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KMT
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