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']
(..) or whereabouts... ...of code name V. If your information leads to his capture... ...you will be released from this facility immediately. Do you understand what I'm telling you? You can return to your life, Miss Hammond. All you have to do is cooperate. (..)2005 V for Vendetta