Why is the InAppPurchase2.order method not executed or showing any errors with iPhone 11

Question

I've been trying to implement in app purchase into an Ionic app. I'm able to make a purchase using my sanbox user for Android but iOS 11 isn't working. The weird thing is that iOS 11 initially worked but stopped all of a sudden. iOS 8 works fine.

Here is the code but none of the console.logs are appearing in the xCode terminal:

  purchase(product: IAPProduct) {
    console.log('purchase', product);
    this.inAppPurchase.order(product)
    .then((p: IAPProduct) => {
      console.log('purchase order', JSON.stringify(p));
      this.registerHandlersForPurchase(product);
    }, e => {
      console.log('failed purchase', JSON.stringify(e));
    });
  }

  registerHandlersForPurchase(product: IAPProduct) {
    console.log('registered', JSON.stringify(product));

    this.inAppPurchase.when(product)
    .approved((p: IAPProduct) => {
      console.log('approved', JSON.stringify(p));
      return p.verify();
    }).verified((p: IAPProduct) => p.finish())
    .error((error) => {
      console.log('approved error', JSON.stringify(error));
    });

  }

I'm not getting any of the console.logs in the terminal output except for the very first one in the purchase method console.log('purchase', product);. After it hits that line in the code I don't see where it's calling the registerHandlersForPurchase() method. Afterwards I'm only getting the output from the inApp debug logs.

2021-03-09 17:43:39.658915-0500 Test App[4035:851787] purchase [object Object]
2021-03-09 17:43:39.667059-0500 Test App[4035:851787] before error
2021-03-09 17:43:39.669607-0500 Test App[4035:851787] [store.js] DEBUG: state: con.ionic.test.app.ios -> requested
2021-03-09 17:43:39.669832-0500 Test App[4035:851787] [store.js] DEBUG: state: con.ionic.test.app.ios -> requested
2021-03-09 17:43:39.671006-0500 Test App[4035:851787] InAppPurchase[objc]: purchase: About to do IAP
2021-03-09 17:43:39.671069-0500 Test App[4035:851787] InAppPurchase[objc]: purchase with discount ((null), (null), (null), (null), (null)).
2021-03-09 17:43:39.671087-0500 Test App[4035:851787] InAppPurchase[objc]:  + discounts API available
2021-03-09 17:43:39.671544-0500 Test App[4035:851787] Found nil parameter when creating SKPaymentDiscount
2021-03-09 17:43:39.671705-0500 Test App[4035:851787] InAppPurchase[objc]: paymentQueue:updatedTransactions: con.ionic.test.app.ios
2021-03-09 17:43:39.671747-0500 Test App[4035:851787] InAppPurchase[objc]: paymentQueue:updatedTransactions: State: PaymentTransactionStatePurchased
2021-03-09 17:43:39.671765-0500 Test App[4035:851787] InAppPurchase[objc]: processTransactionUpdate:withArgs: transactionIdentifier=1000000784140766
2021-03-09 17:43:39.671886-0500 Test App[4035:851787] InAppPurchase[objc]: purchase: About to do IAP
2021-03-09 17:43:39.671905-0500 Test App[4035:851787] InAppPurchase[objc]: purchase with discount ((null), (null), (null), (null), (null)).
2021-03-09 17:43:39.671918-0500 Test App[4035:851787] InAppPurchase[objc]:  + discounts API available
2021-03-09 17:43:39.671933-0500 Test App[4035:851787] Found nil parameter when creating SKPaymentDiscount
2021-03-09 17:43:39.672226-0500 Test App[4035:851787] InAppPurchase[objc]: paymentQueue:updatedTransactions: con.ionic.test.app.ios
2021-03-09 17:43:39.672457-0500 Test App[4035:851787] InAppPurchase[objc]: paymentQueue:updatedTransactions: State: PaymentTransactionStatePurchased
2021-03-09 17:43:39.672536-0500 Test App[4035:851787] InAppPurchase[objc]: processTransactionUpdate:withArgs: transactionIdentifier=1000000784140766
2021-03-09 17:43:39.672998-0500 Test App[4035:851787] InAppPurchase[js]: product con.ionic.test.app.ios has a transaction in progress: 1000000784140766
2021-03-09 17:43:39.673123-0500 Test App[4035:851787] InAppPurchase[js]: product con.ionic.test.app.ios has a transaction in progress: 1000000784140766
2021-03-09 17:43:39.674182-0500 Test App[4035:851787] InAppPurchase[js]: loading appStoreReceipt
2021-03-09 17:43:39.674304-0500 Test App[4035:851787] InAppPurchase[objc]: appStoreReceipt:
2021-03-09 17:43:39.679173-0500 Test App[4035:851787] InAppPurchase[js]: loading appStoreReceipt
2021-03-09 17:43:39.679294-0500 Test App[4035:851787] InAppPurchase[objc]: appStoreReceipt:
2021-03-09 17:43:39.680388-0500 Test App[4035:851787] InAppPurchase[js]: infoPlist: con.ionic.test.app,1.0.21,0,????
2021-03-09 17:43:39.680562-0500 Test App[4035:851787] InAppPurchase[js]: infoPlist: con.ionic.test.app,1.0.21,0,????

Again, this is working on Android. It was working on iOS last week then stopped suddenly. I was initially getting a popup in iOS with the completed transaction now I don't know why it isn't working. I haven't found much help looking online because I'm not even getting an error so it's hard to diagnose.
When I click the purchase button nothing happens, I just get the debug logs listed below. I'm not getting any errors at all. Initially I was getting the pop up displaying a successful purchase but now nothing. I'm testing on a real device...iOS 11 I've been stuck on this for a while now, any help would be greatly appreciated.

plugin I'm using: "cc.fovea.cordova.purchase": "^10.1.1",

Upon further investigation I think this is related to the sandbox user. I tested on a different iOS11 and it worked. So there must be an issue with using the sandbox user multiple times on one device.