Function on TestFlight not during review App issue

Hi Apple Developers

I need advice on how to fix this.

Our new app was coded in React Native and build in Expo SDK 41. It is listed on Play Store since April 2021.

Our iOS version is working perfectly on TestFlight.

Installed on:

  • iPad Air 2
  • iPhone SE
  • iPhone 8
  • iPhone 11, all devices in Namibia

Registration goes smooth and response from API server feels immediately on 3G as well as Wi-Fi and the app works 100%,

yet it seems like the app can't read the JSON response from our API while on Simulator (used a iPhone8 iOS 15) as well as while it is being reviewed during the sign-up process.

I added alert messages to test if the app goes into the response => response.json() block and it doesn't, however, the POST of information does reach the API as the user options is reset once Apple App Review team review and register with the test account.

I have xCode13 , but code on Visual Studio Core in React Native with the Expo SDK 41 to code once and deploy 2x.

Any help or advice would be highly appreciated. Thank you

If anybody else experience this same issue, we had a | (pipe) in our values that was posted that broke the base64 encoding on Apple but not on Android

Function on TestFlight not during review App issue
 
 
Q