Hi!
I try to solve a problem. The amplitude does not receive events. The problem concerns android and ios app version. The problem occurs when passing frontend application events. There are a couple of backend events that the amplitude accepts. Events are not blocked, not filtered, not hidden. Connection software has not changed and not update. All others analytics systems(not amplitude) receive and display events correctly. Last 3-4 days "Total Event Volume" graphic is in "flat". Application is available to user