### Godot version

v4.1.stable.official [970459615]

### System information

Godot v4.1.stable - Windows 10.0.22621 - Vulkan (Forward+) - dedicated NVIDIA GeForce GTX 1660 Ti (NVIDIA; 31.0.15.3598) - AMD Ryzen 7 3700X 8-Core Processor (16 Threads)

### Issue description

is_input_handled() is returning True, even though set_input_as_handled() has not been called.

Example:
`func _input_event(viewport, event, shape_idx):
	print(viewport.is_input_handled())`

Returns 'True', should return 'False'

### Steps to reproduce

1. Create a new project and add a Node2D as the root
2. Add a child Area2D node containing a CollisionShape2D and a Sprite2D
3. Either create the _input_event(viewport, event, shape_idx) or connect _on_input_event(viewport, event, shape_idx)
4. Print viewport.is_input_handled()
5. True is printed.

### Minimal reproduction project

[input_test.zip](https://github.com/godotengine/godot/files/12063748/input_test.zip)

Transform3D object_transform = p_object->get_global_transform();
	Transform3D camera_transform = p_camera->get_global_transform();
	ObjectID id = p_object->get_instance_id();
	
	if (object_transform == physics_last_object_transform && camera_transform == physics_last_camera_transform && physics_last_id == id) {
		Ref<InputEventMouseMotion> mm = p_input_event;
		if (mm.is_valid() && mm->get_device() == InputEvent::DEVICE_ID_INTERNAL) {
			return; 
		}
	}
	p_object->_input_event_call(camera_3d, p_input_event, p_pos, p_normal, p_shape);
	physics_last_object_transform = object_transform;
	physics_last_camera_transform = camera_transform;
	physics_last_id = id;
}
Camera3D *Viewport::get_camera_3d() const {