The cause of the problem was not 'immediately' clear. [=is was not known right away]
They live in the house 'immediately' [='directly'] behind this one.
We need to leave 'immediately'. [='at once', 'right away']
(..) We have a breach. Cordon off this area. Full perimeter wipe-down, right here, right now. Get a mop and escort all civilian personnel from this site immediately. Listen to yourself, Kay. Who talks like that? Why do you think you're so comfortable here? Just about everybody who works (..)2002 Men in Black II