### 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
}
			} else {
				data.process_owner = this;
			}
			{ 
				if (data.process_thread_group == PROCESS_THREAD_GROUP_INHERIT) {
					if (data.parent) {
						data.process_thread_group_owner = data.parent->data.process_thread_group_owner;
					}
					if (data.process_thread_group_owner) {
						data.process_group = data.process_thread_group_owner->data.process_group;
					} else {
						data.process_group = &data.tree->default_process_group;
					}
				} else {
					data.process_thread_group_owner = this;
					_add_process_group();
				}
				if (_is_any_processing()) {
					_add_to_process_thread_group();
				}
			}
			if (data.input) {
				add_to_group("_vp_input" + itos(get_viewport()->get_instance_id()));
			}
			if (data.shortcut_input) {
				add_to_group("_vp_shortcut_input" + itos(get_viewport()->get_instance_id()));
			}
			if (data.unhandled_input) {
				add_to_group("_vp_unhandled_input" + itos(get_viewport()->get_instance_id()));