No, I’m not using any level stream or world browser content in my game.
Does this occur to a specific blueprint or can you reproduce it in a blank project with no additional content? Additionally, what version of the editor are you currently using?
Yes, it seems to always be stuck inside a blueprint. I’m using UE 4.6.1
Do you have any circular dependencies in your script? For instance, do you have any blueprints that cast to another blueprint, and then eventually (may be multiple blueprints interacting in the function) within the same function chain reference the first blueprint or any blueprint within the chain again? If so remove the circular dependency and see if this fixes the error.