As you can see on mobile it’s saying that F150Chief is online (represented by the green circle), but actually it’s the circle saying i am online but around F150Chief’s avatar.
Not sure if this is an issue that would need to be fixed on Who’s Online or on this Theme Component?
I think this is because Who’s Online shows the online indicator on latest poster and not original poster. This is instead Who’s Online related request.
For now if you use original poster shows instead latest poster than you have to disable this setting from Who’s Online plugin. So if the latest poster is online in a topic than it will shows the indicator on topic list avatar even if the avatar is the original poster.