Push notifications on iOS not working for all

Description

Small RC instance with 4 users. 1 receives push notifications on his iOS phone almost all the time, one receives push notifications most of the time and 1 never receives push notification (and 1 is too new to be analysed here). This is about the 1 that never receices notifications on iOS:

Notification settings inside RC app are “Standard” or “All”, notifications inside iOS settings are enabled as well. But neither do any banners or other pop ups appear when a message is sent nor is a bubble shown on the app icon.

The message itself is, however, received and can be seen when the app is opened. In the browser on a Mac, the user also receives notifications. E-Mail notifications also work. It is just on the iPhone that no notifications whatsoever appear.

Server Setup Information

  • Version of Rocket.Chat Server: 6.4.3
  • Operating System: Debian
  • Deployment Method: Docker
  • Number of Running Instances: 1
  • DB Replicaset Oplog: active
  • NodeJS Version: 14.21.3
  • MongoDB Version: 5.0.21
  • Proxy: HAProxy
  • Firewalls involved: pfSense

Any additional Information

Nothing apparently relating to this in the logs.