Unread messages not being marked in sidebar

Description

The unread notification (Bold Letters) in the sidebar is randomly not working.

Server Setup Information

  • Version of Rocket.Chat Server: 3.0.12
  • Operating System: Debian GNU/Linux 9.12 (stretch)
  • Deployment Method: docker
  • Number of Running Instances: 3
  • DB Replicaset Oplog:
  • NodeJS Version: v12.16.1
  • MongoDB Version: 3.6.17
  • Proxy: nginx
  • Firewalls involved:

Any additional Information

We are running 3 rocket.chat servers using the rocket.chat:latest docker image.
We have a mongoDB replica set with 1 primary and 2 secondaries.
We are experiencing an issue where the Sidebar is onlly show unread messages in BOLD randomly, but a reload of the app/browser will make them all show up.

I am curious if there is a setting that I have missed. It seems like the end user UI/UX is not updating fast enough on unread message.

Please help.
Thank you
BP