### Godot version

4.1.dev 2e273f0e35800f2bcc7c05db54100caa97928f69

### System information

macOS 13.4

### Issue description

Removing a SpinBox from the node tree using `remove_child` during the line edit text submit signal will crash the engine.

```
handle_crash: Program crashed with signal 11
Engine version: Godot Engine v4.1.dev.custom_build (2e273f0e35800f2bcc7c05db54100caa97928f69)
Dumping the backtrace. Please include this when reporting the bug to the project developer.
[1] 1   libsystem_platform.dylib            0x0000000183b5aa24 _sigtramp + 56
[2] Viewport::gui_get_focus_owner() (in godot.macos.editor.arm64) + 32
[3] SpinBox::_line_edit_focus_exit() (in godot.macos.editor.arm64) + 28
[4] CallQueue::_call_function(Callable const&, Variant const*, int, bool) (in godot.macos.editor.arm64) + 336
[5] CallQueue::flush() (in godot.macos.editor.arm64) + 908
[6] SceneTree::physics_process(double) (in godot.macos.editor.arm64) + 244
[7] Main::iteration() (in godot.macos.editor.arm64) + 528
```

### Steps to reproduce

Open the minimal reproduction project, click on the SpinBox, press enter, and the engine crashes.

### Minimal reproduction project

[SpinBoxTextSubmitCrash.zip](https://github.com/godotengine/godot/files/11631081/SpinBoxTextSubmitCrash.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 {