Remote Notification Launch APP in background

i does not implementation background push notification in my app. however i found my app launch in background(applicationState is equal to background inapplicationDidFinishLaunch method) and launchOptions contained UIApplicationLaunchOptionsRemoteNotificationKey. the value of UIApplicationLaunchOptionsRemoteNotificationKey does not contained content-available : 1

is it a bug or sepcial case ?

Remote Notification Launch APP in background
 
 
Q