React-Native app is rendered different when distributed with Testflight

Question

I am currently working on a react-native app and everything went smooth so far.

But suddenly on a new testflight release the app is rendered different when distributed with testflight than when i test in the simulator or directly on devices via xcode. With different I mean that big parts of the views are simply not displayed (the app is still working and not crashing however). Previous builds worked fine on testflight.

I tried:

• Product->Clean in xCode
• New Checkout from Git
• Using Fastlane vs building & uploading manually
• Deleting app from device, restarting and reinstalling

But no success. How is that possible? i can understand that it might have different results in simulator vs real device. But real device via xcode vs testflight makes no sense to me. Any help appreciated, thanks!

Answer 1

It is probably quite specific but might help someone at sometime: Problem in my case was that one View I wrote inherited from View instead of Component.

I am still wondering why it was rendered correctly in Debug mode but broken in Release mode but

myView extends Component{
...
}

instead of

myView extends View{
...
}

solved it for me.