After the latest update which was yesterday Updates to work in latest Discourse release / Ember CLI (#35) · discourse/discourse-whos-online@2718393 · GitHub Who’s Online Plugin. Online users section top of the topic list…not refreshing the user avatars instantly. It update avatars if i refresh the page or navigate for example a topic and back.
Before page refresh
After page refresh
As you see the Online (4) is correct but the avatars not updated instantly.