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']
(..) You're considered high-value targets to the capitol. In the event of capture, you'll be given a nightlock pill. A poison that acts immediately. Lieutenant Jackson, do the honors. I've already briefed you on the pods. I remind you, (..)2015 The Hunger Games: Mockingjay - Part 2