iOS IDFA AppsFlyer - Events Won't Log

Question

In an app I am working on we are using Appsflyer to track events in the app. We are using Appsflyer for years now, but since March 2020 we stopped seeing events in the console.

1. In Android App everything works fine

2. I've compared to commits from 2019, and there is no changes in the code related to logging the events

3. When I'm running the app through xcode, the events being logged, when I'm running the same build from Test Flight, the events not logged.

4. When we upload the App to Appstore, we don't check the IDFA checkbox, but we don't check it for other apps that using Appsflyer, and in other apps everything works fine, so I don't think it is relevant.

I will add more info to the post as we go.

Any ideas will be highly appreciated as I ran out of ideas. Thanks.

EDIT:

5. It seems that point "3" irrelevant, Because it seems that it worked only because I ran the app on iOS 12. That being said, it look like the event won't log only in iOS >=13.0

6. LAT Option is turned on in the iPhone settings