Campaign installs on Android not tracked in Facebook Analytics for Apps

[goshki]

I'm observing a large difference in tracking campaign installations between Android and iOS. Analytics for Apps show about 1000 installs on iOS and just 5 on Android (which correlates to the number of developer installations of the game). I'm cross-checking in Game Analytics and Google Developer console and I can see that there are much more Android players than reported by install tracking (and they're not organic players).

I've integrated Facebook SDK for Unity as described here and here, with a standard activation procedure described here:

void Awake() {
    if (!FB.IsInitialized) {
        FB.Init(() => {
            FB.ActivateApp();
        });
    } else {
        FB.ActivateApp();
    }
}

void OnApplicationPause(bool pause) {
    if (!pause) {
        FB.ActivateApp();
    }
}

The Facebook application created for this project has been reviewed and approved by Facebook team. Is there anything that I'm not aware of that would prevent campaing installs from being tracked properly by Facebook SDK for Unity on Android?

[goshki]

Seems like the issue was not SDK related.