• Xcode version: 11.4 (11E146)
• Firebase SDK version: 6.26.0
• Firebase Component: Analytics
• Component version: 6.4.1
• Installation method: CocoaPods

I am trying to log event to Firebase Analytics when app is launched for background fetch.
Based on the document, session_start should be only logged when the app is in the foreground. However, I found sessions are created during the background fetch.

Is it a bug? Or please advise how should I avoid it.