MultiplayerSpawner errors when spawn_path is pointing to itself

[Weldify]

Tested versions

Noticed this during 4.4 beta1, still an issue in 4.4 beta2

System information

Windows 10

Issue description

Having 2 or more auto spawn list nodes pre-added to a multiplayer spawner that has spawn_path set to itself causes this error:

E 0:00:00:0553   _node_ready: Condition "!spawn_queue.has(p_oid)" is true.
  <C++ Source>   modules/multiplayer/scene_replication_interface.cpp:175 @ _node_ready()

Steps to reproduce

1. Create a MultiplayerSpawner and spawn_path to point to itself
2. Create 2 scenes and assign them to the auto spawn list on the MultiplayerSpawner
3. Add instances of the 2 scenes as children of the MultiplayerSpawner and run the game

Minimal reproduction project (MRP)

repro.zip