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purchaseUpdatedListener called multiple times even after purchase

See original GitHub issue

Version of react-native-iap

5.0.1

Version of react-native

0.63.3

Platforms you faced the error (IOS or Android or both?)

IOS

Expected behavior

purchaseUpdatedListener not getting called multiple times

Actual behavior

purchaseUpdatedListener getting called on startup multiple times, sometimes even in between

Tested environment (Emulator? Real Device?)

Real device (iOS 14, 13 in Test Flight and in AppStore)

Steps to reproduce the behavior

(Navigator Component)

const itemSkus = ['01', '02'];

const processNewPurchase = async (purchase) => {
  const { productId, transactionReceipt } = purchase;
  if (transactionReceipt !== undefined && transactionReceipt) {
       //backend call with fetch - validating receipt 
        if (data.ack === 'success') {
          console.log('finished');
          await finishTransaction(purchase);
      } else if (data.ack === 'failure') {
          props.setProcessing(false);
          console.log('error');
      }
    }
};


const getProductsIAP = useCallback(async () => {
  await clearProductsIOS();
  await clearTransactionIOS();

 try {
   const result = await initConnection();
   const products = await getProducts(itemSkus);
   props.setProducts(products);
   console.log('result', result);
 } catch (err) {
   console.warn(err.code, err.message);
 }

  purchaseUpdateSubscription = purchaseUpdatedListener(
    async (purchase) => {
      const receipt = purchase.transactionReceipt;
      console.log('purchaseUpdatedListener');
      if (receipt) {
        try {
          await processNewPurchase(purchase);
        } catch (ackErr) {
           console.log('ackErr', ackErr);
        }
      } else {
        console.log('purchaseUpdatedListener error: receipt');
      }
    },
  );

  purchaseErrorSubscription = purchaseErrorListener(
    (error: PurchaseError) => {
      console.log('purchaseErrorListener', error);
      console.log(JSON.stringify(error));
    },
  );

  setLoading(false);
}, []);


useEffect(() => {
  getProductsIAP();

  return () => {
    if (purchaseUpdateSubscription) {
      purchaseUpdateSubscription.remove();
      purchaseUpdateSubscription = null;
    }
    if (purchaseErrorSubscription) {
      purchaseErrorSubscription.remove();
      purchaseErrorSubscription = null;
    }
  };
}, []);