Popup window with COM_EASYSOCIAL_LOGIN_ALREADY_LOGGED

Hello. There is no detail steps to reproduce issue. I used iphone 6 with safari.

Somitimes I just see popup with text COM_EASYSOCIAL_LOGIN_ALREADY_LOGGED.
And I can't find this text in fronend en-GB.com_easysocial.ini file.

Usualy it happens when I don't use phone or browser for a time, and then return to it and press non-easysocial menu button (home icon) that shoul redirect me to dashboard. So be sure I dodn't press buttons of notification module.

Any way at the moment I would like to know what text should be display in popup to translate it?

Thanks.