It looked like you were checking the other actor against an instance of your player character that was present in the world in the editor (as opposed to spawned on begin play). Are you sure the player you had in your level was being possessed on play, and that you weren’t actually just spawning another one?
Either way if you’re just trying to check that the actor that triggered the overlap is your player, the easiest way is to simply Cast the Other Actor to your player character class. If it succeeds, it’s your player, assuming you only have one instance of your player character in the world. If you had multiple instances of your player character (and switched which one you controlled like in Dragon Age or many other RPGs), you could just check that Other Actor == GetPlayerCharacter, since GetPlayerCharacter always returns the pawn that is currently possessed by your player controller.