Chat message not shown as sent nor received message displayed until page is refreshed

Description:

• Running rocket chat on docker behind nginx reverse proxy and Plesk
• Using rocketchat version 6.5.3
• Case 1: When I am in a direct chat with another user and I send a message, it is not shown as sent (changing color from grey to black) until I manually refresh the page
• Case 2: When I am in that chat and another user sends a message to me, it is shown shown until I refresh the page

Steps to reproduce:

1. Access a user chat
2. Send a message to another user

or

1. Access a user chat
2. Wait for a user to send you a message
3. Refresh page

Expected behavior:

I would expect new messages to show up automatically

Actual behavior:

New or sent message are only shown once page is reloaded

Server Setup Information:

• Version of Rocket.Chat Server: 6.5.3
• Operating System: Docker containter
• Deployment Method: docker
• Number of Running Instances: 1
• DB Replicaset Oplog: unknown
• NodeJS Version: as per docker container
• MongoDB Version: latest

Client Setup Information

• Desktop App or Browser Version: Chrome Version 121.0.6167.85 (Official Build) (arm64)
• Operating System: macOS

Additional context

Rocketchat runs in container behind nginx reverse proxy

Relevant logs:

No files or tests are identified. Reproduce the direct-message cases in Rocket.Chat 6.5.3 with Docker behind an nginx reverse proxy, comparing behavior before and after a page refresh; inspect the missing server and browser logs if available. Done means sent and received messages appear automatically without reloading.