Tasks not working when context actor set to Actor in State Tree

Tasks not working properly when setting the Context Actor Class to Actor in State Tree AI Component Schema.

I have a task like this.

I can confirm that the message is being sent, but the task does nothing.
I used Print String for the variable and it seems the AI controller is set instead of the actor.

If I set the Context Actor Class to Character or Pawn, it works as expected.

Any help would be appreciated.