So I'm playing Martian Memorandum right now and for some reason the game doesn't register that a character has given me a new name to investigate.

For example:
Guy Caballero mentions a jungle house and Johnny Fedora but after speaking with him I still can't question anyone about those two subjects.

Mac Malden says he needs help on the Andretti case but I can't question anyone about Andretti either.

Is my game bugged?

Yeah that doesn't sound right.

I just played this a month ago and I remember being able to ask people about andretti right after Malden mentioned him.

Can you ask your secretary about them?