Why does Facebook Insights report zero app installs?

Question

My problem or misunderstanding: On the main dashboard, developers.facebook.com/apps/<app id> the value Last Mobile Install Reported is always updated correctly when I perform a new install. However, when I go to Insights and click on the Mobile App Installs section, the value reported is zero. Why is zero still reported?

Other Info

• Under Insights -> App Events, fb_mobile_activate_app is always reported but fb_mobile_first_app_launch is never reported.
• I did put the my key's hash in the Key Hashes section.
• I updated my proguard configuration to include what Facebook recommends.
• I am manually installing the application. I am not installing through the play store.
• Sandbox Mode is turned on.

The Facebook API Call

public void onResume() {
    super.onResume();
    String appId = getResources().getString(R.string.facebook_app_id);
    AppEventsLogger.activateApp(getApplicationContext(), appId);
}

Photo showing latest Install

Photo showing App Events are reported

Photo showing zero installs... Why?!?

Answer 1

Everything was setup correctly. It took somewhere between 72 hours and 1 week for the mobile app installs graph to be populated with the install data.