Spawn Actor From Class is not accessible inside of a blueprint function library. It is expected that it would be accessible and would come with an exposed world context object pin.
1. Open the editor
2. Create a new Blueprint Function Library
3. Attempt to add a Spawn Actor From Class node
Result: Notice that even without context sensitive enabled, the node does not show up.
Expected: The Spawn Actor From Class node would appear and have an exposed World Context Object pin.
There's no existing public thread on this issue, so head over toAnswerHub just mention UE-31501 in the post.