I can not tell you it is realy a bug or a misconfiguration in my board/server so I report it here:

when someone login as invisible user, whois online page keep showing him as an online user for moderators and admins who can see invisible users.

they see `Forum location` of that user as `Index page` and also `last date` is `one minute ago`
this continue until someone else with same IP login to forum or session completely expire (Session length in acp). actually `View online time span` in acp do not work for invisible user!

• again: I am not sure this is a bug or mistake in configuration or something from a MOD.