Android Question Firebase Analytics - Is something changed?

[Pendrush]

My last app revision was before 6 months. Before 7 days I have updated SDK to latest recommended versions and make another app update. After update, as users get to new version, app have a 35% drop in daily/weekly/month users, but in the same time AdMob requests remain steady as they before. Also all other parameters have drop, daily engagement, engagement per user and all other parameters.
Did something changed in latest SDK or anyone have similar issue?
Maybe wrapper need update?

 

[Erel]

I'm not familiar with any relevant change. The wrapper almost does nothing. FirebaseAnalytics works automatically.