Affected studios: Bingo Blitz, Best Fiends, Redecor, Slotomania, WSOP
User affect: players do not receive the purchased goods.
For verifying purchase Bingo Blitz use receipt data from SKPaymentTransaction.TransactionReceipt (https://developer.apple.com/documentation/storekit/skpaymenttransaction/1617722-transactionreceipt) And for some purchases the receipt contains transaction id of previous, already fulfilled purchase.
The similar issue is posted here https://developer.apple.com/forums/thread/736247