Description:

This is likely a duplicate of #15471 however that issue was closed with 3.0.0. However the issue partially remains with us.

When entering a channel after receiving a new message the counter on the left goes up to indicate a new message, and once entering the message (either DM / Public / Private channel) the red "New message" line remains. Pressing ESC key does not work.

Steps to reproduce:

1. Receive new message either via DM / Private / Public channel
2. User clicks into the channel or DM and see's the new message.
3. User presses ESC key to clear unreads.

Expected behavior:

The horizontal red "New Message" bar should go away when entering or when pressing esc, and the counter on the left side also goes away.

Actual behavior:

The unread message red horizontal line remains. The left side counter clears correctly.

Server Setup Information:

• Version of Rocket.Chat Server: 3.0.0
• Operating System: Debian Stretch
• Deployment Method: Docker
• Number of Running Instances: 2
• DB Replicaset Oplog: Yes
• NodeJS Version: 12.14.0
• MongoDB Version: 3.6

Client Setup Information

• Desktop App or Browser Version: Chrome 80.0.3987.106
• Operating System: Windows 10

Additional context

This issue was present in 2.4.x
This issue has been noted in the latest Rocket Chat app for windows 10
The issue has been noted in Firefox / Brave browsers.
It may be best to re-open #15471