NSUserTrackingUsageDescription warning not showing

Hello. Recently I've added an NSUserTrackingUsageDescription in the Info.plist of the app I'm working on. It works fine (the warning shows up) when I deploy it on testing device myself. However, the TestFlight build doesn't show any warning and there is no option in Settings for the app to allow tracking. Is it a TestFlight special behaviour or the warning shoud show up regardless it is a debug, TestFlight or App Store version of an app?