• Your Rocket.Chat Experimental app version: Testflight 1.20.0 (11407)
• Your Rocket.Chat server version: 1.2.1
• Device (or Simulator) you're running with: iPhone 8

When app is first installed, channel avatars are displayed. Eventually (e.g. after the app is closed and re-opened), these are unloaded and only are displayed when the channel receives a new message (and disappear at some point afterwards, e.g. after another restart).