I mentioned this in another Thread somewhere - a while back
If you go to the Profile Icon, once you have signed in.
You can select from here to show online or offline.
Toggle between the two choices and eventually it does change.
I selected online, nothing happened (same as you)
choose offline, it won't change as it's already showing offline.
choose online, it may kick back to showing online.
back to offline if nothing changes from the last choice.
and so on, it does change eventually.
think it was my 3rd attempt that it finally changed.
You can change the online / offline appearance before signing in...
Options button then choose the mode you want.
If it then signs you in and it's the wrong mode, go to the Profile Icon and do the above.