### Godot version

v4.2.rc.custom_build [702227129]

### System information

Godot v4.2.rc (702227129) - Debian GNU/Linux trixie/sid trixie - X11 - Vulkan (Forward+) - dedicated NVIDIA GeForce GTX 1060 6GB (nvidia) - AMD Ryzen 5 1600 Six-Core Processor (12 Threads)

### Issue description

Found a consistent crash when calling `hide()` from `_notification()`.
It does not happen if the call is deferred.

### Steps to reproduce

The `hide_test.gd` script has a boolean `cause_crash`. If it is true, hovering the mouse over the label crashes without an error in the Godot Editor Console. If it's false it hides the label as expected.

### Minimal reproduction project

[hide_crash.zip](https://github.com/godotengine/godot/files/13452818/hide_crash.zip)

}
		Vector2 pos = c->get_global_transform_with_canvas().affine_inverse().xform(p_pos);
		if (c->is_stretch_enabled()) {
			pos /= c->get_stretch_shrink();
		}
		for (int i = 0; i < c->get_child_count(); i++) {
			SubViewport *v = Object::cast_to<SubViewport>(c->get_child(i));
			if (!v || v->is_input_disabled()) {
				continue;
			}
			if (notify_embedded_viewports) {
				v->notification(NOTIFICATION_VP_MOUSE_ENTER);
			}
			v->_update_mouse_over(v->get_final_transform().affine_inverse().xform(pos));
		}
	}
}
void Viewport::_mouse_leave_viewport() {
	if (!is_inside_tree() || is_input_disabled()) {
		return;
	}
	if (gui.subwindow_over) {
		gui.subwindow_over->_mouse_leave_viewport();
		gui.subwindow_over = nullptr;
	} else if (gui.mouse_over) {
		_drop_mouse_over();
	}
	notification(NOTIFICATION_VP_MOUSE_EXIT);
}
void Viewport::_drop_mouse_over(Control *p_until_control) {