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iOS IAP crashing on reviewers iPAD


Trying to get an app approved on Apple.

Had several issues like excessive ads (which was determined to be caused by intermediate / interstitial ads between rooms...which is debatable)
Also issue with me linking out from the app to a website which provided information about a pro version of the app, which again is not really against any guidelines I read
An issue with being told I was forcing users to enable tracking even though I wasnt as I had an ad disclosure notice on app launch which users could dismiss and close the app (works on Android but on iOS you cant do end_game() so this was the issue)

Most recent issue is that they are saying the app crashes when they try to make an IAP on their iPad device:

Hardware Model: iPad11,3
Process: _myapp [840]
Path: /private/var/containers/Bundle/Application/7C8E13DC-1C73-49FF-B378-ADE71A64727A/_myapp .app/_myapp
Identifier: uk.rizbit._myapp
Version: 8.7.0 (8.7.0)
AppStoreTools: 12C29
Code Type: ARM-64 (Native)
Role: Foreground
Parent Process: launchd [1]
Coalition: uk.rizbit._myapp[659]

Date/Time: 2020-12-29 21:44:41.4179 -0800
Launch Time: 2020-12-29 21:18:46.2989 -0800
OS Version: iPhone OS 14.3 (18C66)
Release Type: User
Baseband Version: n/a
Report Version: 104

Exception Type: EXC_CRASH (SIGABRT)
Exception Codes: 0x0000000000000000, 0x0000000000000000
Triggered by Thread: 0

Application Specific Information:
abort() called

Last Exception Backtrace:
(0x18618286c 0x19b0f1c50 0x1861f2e1c 0x1861ff440 0x18606323c 0x100ea8598 0x100ea8244 0x100ea8064 0x1a3eea534 0x185d7524c 0x185d76db0 0x185d847ac 0x1860fe11c 0x1860f8120 0x1860f721c 0x19dbfb784 0x188b35fe0 0x188b3b854 0x10111b910 0x185db76b0)
Thread 0 crashed with ARM Thread State (64-bit):
x0: 0x0000000000000000 x1: 0x0000000000000000 x2: 0x0000000000000000 x3: 0x0000000000000000
x4: 0x000000016f08dff0 x5: 0x000000016f08e5a0 x6: 0x000000000000006e x7: 0x0000000000008500
x8: 0x00000000000005b9 x9: 0x892bf1003de6a1bf x10: 0x0000000000000002 x11: 0x0000000000000003
x12: 0x0000000000000000 x13: 0x0000000000000001 x14: 0x0000000000000010 x15: 0x0000000000000050
x16: 0x0000000000000148 x17: 0x0000000103b938c0 x18: 0x0000000000000000 x19: 0x0000000000000006
x20: 0x0000000000000407 x21: 0x0000000103b939a0 x22: 0x0000000000000000 x23: 0x0000000000000000
x24: 0x0000000002ffffff x25: 0x0000000103b939a0 x26: 0x00000000000020ff x27: 0x0000000000000114
x28: 0x00000002829c8f00 fp: 0x000000016f08e500 lr: 0x00000001d0c9ab40
sp: 0x000000016f08e4e0 pc: 0x00000001b3864414 cpsr: 0x40000000
esr: 0x56000080 Address size fault
Ive tested the IAPs on iPhone and iPad using both dev and adhoc profiles and it works fine. I was only able to find this crash issue when you try to CANCEL the IAP, in which case I saw the following in the XCODE debug console:
2020-12-30 15:15:46.459749+0000 _myapp[498:34614] iOS IAP Purchase Initiated: g6_credits_100
2020-12-30 15:15:46.473206+0000 _myapp[498:34614] **** Your purchase Initiated ****
2020-12-30 15:16:16.193467+0000 _myapp[498:34614] Pause event has been registered for this frame
2020-12-30 15:16:16.205022+0000 _myapp[498:34614] Pause event has been unregistered
2020-12-30 15:16:16.431695+0000 _myapp[498:34906] <SKPaymentQueue: 0x281d3c5d0>: Payment completed with error: Error Domain=ASDErrorDomain Code=907 "Unhandled exception" UserInfo={NSUnderlyingError=0x2811ac270 {Error Domain=AMSErrorDomain Code=6 "Payment Sheet Failed" UserInfo={NSLocalizedDescription=Payment Sheet Failed, NSLocalizedFailureReason=Payment sheet cancelled}}, NSLocalizedFailureReason=An unknown error occurred, NSLocalizedDescription=Unhandled exception}
2020-12-30 15:16:16.433518+0000 _myapp[498:34614] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '*** -[__NSDictionaryM setObject:forKey:]: key cannot be nil'
*** First throw call stack:
(0x1b2a2f9d8 0x1c6d98b54 0x1b2a99d98 0x1b2aa53a0 0x1b291b2f0 0x10451f8d4 0x10451f400 0x10451f14c 0x1cf41497c 0x1079b7ce4 0x1079b9528 0x1079c7994 0x1b29af5e0 0x1b29a9a88 0x1b29a8ba0 0x1c96e6598 0x1b52983d8 0x1b529d958 0x1048127d4 0x1b2687568)
libc++abi.dylib: terminating with uncaught exception of type NSException
*** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '*** -[__NSDictionaryM setObject:forKey:]: key cannot be nil'
terminating with uncaught exception of type NSException
I assume this code error is in the official ios iap extension code?

Are there any known issues or bugs with the Apple IAP extension or the IOS IAP functions?
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