Deferred deep links in flutter, not working in sandbox/production from debug build.

[ToddZeil]

I have tried building to actual device on iOS and Android and can't get the call back to fire.

I have followed the steps:
https://dev.adjust.com/en/sdk/ios/features/deep-links/testing/#test-deferred-deep-linking

I have also tried toggling on Enable probabilistic modeling reattribution

Is there something I am missing? Is there a way to test this with debug builds ?
Or does this need to be on a production release build to actually work.