Does your Door object also have a GraphOwner component (BehaviourTreeOwner, FSMOwner)?
If so, you can explicitely select the object to receive the event of a SendEvent action, by overriding the agent at the top where it reads “Self”:
[attachment file=”AgentOverride.png”]
Doing the above, will send the event to the specified object only.
Let me know if that works for you.