Updated FAQ

FAQ.md

@@ -299,6 +299,9 @@ In practice this means that the status bar notification doesn't take space in th
 You can switch to periodically synchronization of messages in the receive settings to remove the notification, but be aware that this might use more battery power.
 See [here](#user-content-faq39) for more details about battery usage.
 
+Android 8 Oreo might also shows a status bar notification with the text *Apps are running in the background*.
+Please see [here](https://www.reddit.com/r/Android/comments/7vw7l4/psa_turn_off_background_apps_notification/) about how you can disable this notification.
+
 Some people suggested to use [Firebase Cloud Messaging](https://firebase.google.com/docs/cloud-messaging/) (FCM) instead of an Android service with a status bar notification,
 but this would require email providers to send FCM messages or a central server where all messages are collected sending FCM messages.
 The first is not going to happen and the last would have significant privacy implications.