Truple randomly stopped monitoring and screenshotting my partners android phone.

At 9:47 an app closes and at 9:57 the event log says "monitoring app shutdown: usage stat" then "on start command". It shows a few apps but no data or histories or screenshots are captured. At 10:02 the log shows an event of an app being closed then the next event is at 10:20 and says "Monitoring App Launched: previous exited due to self" Then from 10:22 to 10:40 there's nothing captured. After this only apps are captured. No histories or screenshots. There was never an alert or anything sent to me. Nothing was captured or flagged.

Has this happened to anyone else? What could have caused it? The phone didn't update and the app didn't either. I'm disappointed that the device went 30 minutes without being monitored at all then the rest of the day without screenshots or histories captured and not a single flag or alert came up.