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']
(..) Go! Go! seconds to impact. Now, Gwen, do it now...! Unit . This is La Guardia tower. Turn immediately to heading . Incoming traffic, I repeat . Okay people, back to work, let's land these planes. I'll be back. Thank God, alright! Alright, we're back, everyone, lets go. (..)2014 The Amazing Spider-Man 2