iPhone storekit sandbox stopped working

Question

Bug reported as fixed by Apple, see accepted answer below ...

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UPDATE MON AUG 23rd 10:00 GMT

Although the bug report with apple hasn\'t been closed yet,

Answer 1

After announced "fix" by apple still have this trouble. It's feels like purchase transaction just falls off while test user input his credentials. But when test user is already logged in, everything is OK.

Either [SKPayment paymentWithProduct:product] nor [SKPayment paymentWithProductIdentifier:product.productIdentifier] works with logged out user in spite of products request was successful.

Does anyone have any workaround?