May get an error message when move a node among a window and other types of nodes

[Rindbee]

Godot version

v4.0.alpha15.official [432b25d]

System information

Linux mint 20.3, NVIDIA GeForce GTX 1050 Ti

Issue description

If the previous parent of the node is a window, you may get an error message as the node moves through the tree.

ERROR: Disconnecting nonexistent signal 'visibility_changed', callable: CanvasItem::_window_visibility_changed.
   at: _disconnect (core/object/object.cpp:1330)

Steps to reproduce

1. Move a node to a window;
2. Move the node among other types of nodes.

Minimal reproduction project

No response