Description:

When mentioning a User in a room and the @username is the start of the message, it isn't being converted to the Name in bold and blue.

Steps to reproduce:

1. Join Room
2. Write message like @lennart.grunau How are you
3. Send message.

Expected behavior:

@lennart.grunau is formatted as Lennart Grunau in blue.

Actual behavior:

@lennart.grunau isn't being formatted at all.

Server Setup Information:

• Version of Rocket.Chat Server: 0.66.2
• Operating System: Ubuntu 16.04 LTS
• Deployment Method: snap
• Number of Running Instances: 1
• DB Replicaset Oplog: Enabled
• NodeJS Version: Shipped with 0.66.2 snap
• MongoDB Version: Shipped with 0.66.2 snap

Additional context

The mention itself is fully functional but it isn't formatted.

Relevant logs:

No relevant logs.