Same issue, although only versions < iOS 15.0 seem to be affected.
wscheper
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Not sure if that error code catches all errors of that type. As a quick fix were now showing an activity indicator and are postponing any error messages for +- 20 secs. This gives us time to keep the error message away from the user, when in that time a purchase was successful after all. Still not the best solution.
I'm experiencing this issue for at least a month now as well. I was watching this issue and hoping for a solution.
In my case Firebase shows thousands of crashes related to CoreData or CoreFoundation on one of the following:
"PFObjectIDFastHash64"
"-[NSManagedObjectContextdisposeObjects:count:notifyParent:]"
"CFBasicHashRemoveValue"
It's only iOS 14 and although I don't know how reliable the data is, but the majority seems to be on iPhone.
I'm not able to reproduce it and haven't heard any significant complaints from our helpdesk either.