Firebase Analytics Audiences are not logged

Question

I can't see statistics for my user in Firebase Analytics Audiences. Audiences are built before fetching events. I can see those logs in Logcat and DebugView. Over 24h have passed.

This is what I do in my Android App:

// in onCreate
firebaseAnalytics = FirebaseAnalytics.getInstance(this);            

//in onResume
firebaseAnalytics.setUserId("10101010");
firebaseAnalytics.setUserProperty("client_number", "10101010");

In tab User Properties I have defined client_number. In Logcat and DebugView I can see those logs.

D/FA: Setting user property (FE): _id, 10101010
D/FA: Setting user property (FE): client_number, 10101010

and DebugView:

And finally I have constructed Audiences (before trigger events), where:

• user_id exactly matches 10101010

• client_number exactly matches 10101010 at any point

  

But the Audiences are unfortunately empty (< 10 Users). The number of All Users is 59 (so it's more than mandatory 10). Any suggestion what went wrong?