### 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)

ERR_MAIN_THREAD_GUARD;
	ERR_FAIL_UNSIGNED_INDEX(p_layer, 32);
	if (p_enable) {
		set_canvas_cull_mask(canvas_cull_mask | (1 << p_layer));
	} else {
		set_canvas_cull_mask(canvas_cull_mask & (~(1 << p_layer)));
	}
}
bool Viewport::get_canvas_cull_mask_bit(uint32_t p_layer) const {
	ERR_READ_THREAD_GUARD_V(false);
	ERR_FAIL_UNSIGNED_INDEX_V(p_layer, 32, false);
	return (canvas_cull_mask & (1 << p_layer));
}
#ifndef _3D_DISABLED
AudioListener3D *Viewport::get_audio_listener_3d() const {
	ERR_READ_THREAD_GUARD_V(nullptr);
	return audio_listener_3d;
}
void Viewport::set_as_audio_listener_3d(bool p_enable) {
	ERR_MAIN_THREAD_GUARD;
	if (p_enable == is_audio_listener_3d_enabled) {
		return;
	}
	is_audio_listener_3d_enabled = p_enable;
	_update_audio_listener_3d();
}
bool Viewport::is_audio_listener_3d() const {