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']
(..) This dock is off limits to civilians. I'm terribly sorry. I didn't know. If I see one, I shall inform you immediately. There's some sort of high-toned and fancy to-do up at the fort. How could it be two upstanding gentlemen such as yourselves did not merit an invitation? (..)2003 Pirates of the Caribbean: The Curse of the Black Pearl
(..) I'm just saying it. Pirates. There's no proof of that. It's probably an accident. LT.NORRINGTON: Rouse the captain immediately. Heave to and take in sail. Launch the boats. Elizabeth, I want you to accompany the boy. He'll be in your charge. (..)2003 Pirates of the Caribbean: The Curse of the Black Pearl