I just tried to reproduce, in a pristine VM will all updates applied.
* Created a new user
* logged in and removed the indicator applet and the session applet (fusa replacement)
* logged out and back in again
* verified there were no processes related to the indicator running with ps
* started empathy for the first time, added my account and it signed me in and set me to online
* the status icon displayed as desired
* i then quit empathy and logged out
* logged back in again and started empathy
* the status icon was displayed and i my status was set to available
Seems to work as desired in a clean install, i am not sure what could be different in your setup.
I just tried to reproduce, in a pristine VM will all updates applied.
* Created a new user
* logged in and removed the indicator applet and the session applet (fusa replacement)
* logged out and back in again
* verified there were no processes related to the indicator running with ps
* started empathy for the first time, added my account and it signed me in and set me to online
* the status icon displayed as desired
* i then quit empathy and logged out
* logged back in again and started empathy
* the status icon was displayed and i my status was set to available
Seems to work as desired in a clean install, i am not sure what could be different in your setup.