### Godot version

v4.1.rc1.official [1f9e540f1]

### System information

Windows 10

### Issue description

Attempting to reorder the children of a TabContainer results in an unintended ordering and incorrect undo states.

Also happens in v4.0.3.stable.official [5222a99f5].

https://github.com/godotengine/godot/assets/3820082/2c2458e3-88ad-46d9-8a04-f289a049984a



### Steps to reproduce

1. Add a new TabContainer
2. Add a few children to it
3. Drag and drop to erroneously reorder them
4. Attempt to undo the change

### Minimal reproduction project

N/A
Node *node = get_node_or_null(p_path);
	if (unlikely(!node)) {
		const String desc = get_description();
		if (p_path.is_absolute()) {
			ERR_FAIL_V_MSG(nullptr,
					vformat(R"(Node not found: "%s" (absolute path attempted from "%s").)", p_path, desc));
		} else {
			ERR_FAIL_V_MSG(nullptr,
					vformat(R"(Node not found: "%s" (relative to "%s").)", p_path, desc));
		}
	}
	return node;
}
bool Node::has_node(const NodePath &p_path) const {