Comment by lucasar

I am an iOS developer and most likely the problem is related to configuration and basic analytics, not "siphoning" app data.

Offending code :

if (restrictiveParams[eventName][@"is_deprecated_event"]) {

        [deprecatedEventSet addObject:eventName];

}

So, the iOS library does not check for nil, and whatever the server is returning does not have the expected content. Lame.