I am a team member of iOS App 抖音短视频（Top 1 of App Store China, Bundle ID: com.ss.iphone.ugc.Aweme ）. We use Fabric for crash log collections. It worked fine until the App DAU dropped to 10% on February 6, 2018. The actual DAU is around 20,000,000.
I checked the code related with Fabric, and found the latest modification is about 3 months ago.
I don’t know what happened actually. Could you help investigate this case？What else can I do to diagnose this？
The DAU graph is below:
From the response of Crashlytics setting interface, I found ““sampling_rate”: 10,”, which is un-normal.