Don’t use input in actors other than your Character BP or Level BP; it rarely works as planned.
What you want to do is create a Custom Event in the BP, and call that event from the Character or Level BP.
Let’s say you have a Door BP, and you create a Custom Event called Open Door. In the Character or Level BP you do the following: Press 1 => Get All Actors Of Class (Door) => Foreach Loop => Open Door