Well I call it a bug as it works different than 7.x and I think it is not doing what it is supposed to.
Using wwf as a user on 2 different computers.
When I read Active Topics on 2nd Computer and return to Computer 1 it kept the last visit day of Computer 1 and not the last visit day of Computer 2 so, i.e. CPU1 Last Visit Date was Jan10 and CPU2 Last Visit Date was Jan 12. When I return to CPU1 on Jan13 it shows active topics since Jan10 as opposed to Jan12
Version 7.x did it better where it appeared to read last visit date from the db.