Everything seems to be working as expected!

scenes/game.gd

@@ -36,12 +36,19 @@ func _on_multiplayer_peer_connected(peer_id: int) -> void:
 	if multiplayer.is_server():
 		for peernode in peer_dir.get_children():
 			peer_dir.rpc_create_peernode.rpc_id(peer_id, peernode.get_multiplayer_authority())
+		for playernode in player_dir.get_children():
+			player_dir.rpc_possess_playernode.rpc_id(peer_id, playernode.player_name, playernode.get_multiplayer_authority())
+			playernode.rpc_query_name.rpc_id(playernode.get_multiplayer_authority())
+			playernode.rpc_query_color.rpc_id(playernode.get_multiplayer_authority())
 		peer_dir.rpc_create_peernode.rpc(peer_id)
 
 func _on_multiplayer_peer_disconnected(peer_id: int) -> void:
 	Log.peer(self, "Peer disconnected: %d" % peer_id)
 	if multiplayer.is_server():
-		peer_dir.rpc_destroy_peernode(peer_id)
+		for playernode in player_dir.get_children():
+			if playernode.get_multiplayer_authority() == peer_id:
+				player_dir.rpc_possess_playernode.rpc(playernode.player_name, 1)
+		peer_dir.rpc_destroy_peernode.rpc(peer_id)
 
 
 func _on_peerdir_peernode_created(peernode: PeerNode) -> void:
@@ -51,9 +58,6 @@ func _on_peerdir_peernode_created(peernode: PeerNode) -> void:
 
 func _on_peerdir_peernode_destroyed(peernode: PeerNode) -> void:
 	Log.peer(self, "Peernode destroyed: %d" % peernode.get_multiplayer_authority())
-	for playernode in player_dir.get_children():
-		if playernode.get_multiplayer_authority() == peernode.get_multiplayer_authority():
-			playernode.possess(1)
 
 func _on_peerdir_peernode_identified(player_name: String, peernode: PeerNode) -> void:
 	Log.peer(self, "Peernode identified: %d → %s" % [peernode.get_multiplayer_authority(), player_name])
@@ -61,20 +65,19 @@ func _on_peerdir_peernode_identified(player_name: String, peernode: PeerNode) ->
 
 
 func _on_playerdir_playernode_created(playernode: PlayerNode) -> void:
-	Log.peer(self, "Playernode `%s` created" % playernode.name)
+	Log.peer(self, "Playernode `%s` created" % playernode.player_name)
 
 func _on_playerdir_playernode_destroyed(playernode: PlayerNode) -> void:
-	Log.peer(self, "Playernode `%s` destroyed" % playernode.name)
-	# Technically, this shouldn't ever happen
+	Log.peer(self, "Playernode `%s` destroyed" % playernode.player_name)
 
 func _on_playerdir_playernode_name_changed(old: String, new: String, playernode: PlayerNode) -> void:
-	Log.peer(self, "Playernode `%s` changed name: %s (was %s)" % [playernode.name, new, old])
+	Log.peer(self, "Playernode `%s` changed name: %s (was %s)" % [playernode.player_name, new, old])
 
-func _on_playerdir_playernode_color_changed(old: Color, new: String, playernode: PlayerNode) -> void:
-	Log.peer(self, "Playernode `%s` changed color: %s (was %s)" % [playernode.name, new, old])
+func _on_playerdir_playernode_color_changed(old: Color, new: Color, playernode: PlayerNode) -> void:
+	Log.peer(self, "Playernode `%s` changed color: %s (was %s)" % [playernode.player_name, new, old])
 
 func _on_playerdir_playernode_possessed(old: int, new: int, playernode: PlayerNode) -> void:
-	Log.peer(self, "Playernode `%s` possessed: %d (was %d)" % [playernode.name, new, old])
-	if playernode.is_multiplayer_authority():
+	Log.peer(self, "Playernode `%s` possessed: %d (was %d)" % [playernode.player_name, new, old])
+	if playernode.is_multiplayer_authority() and not multiplayer.is_server():
 		playernode.rpc_set_name.rpc(local_player_name)
 		playernode.rpc_set_color.rpc(local_player_color)

scenes/game.tscn

@@ -14,6 +14,8 @@ script = ExtResource("1_cdtng")
 [connection signal="child_entered_tree" from="PeerNodeDirectory" to="." method="_on_peerdir_peernode_created"]
 [connection signal="child_exiting_tree" from="PeerNodeDirectory" to="." method="_on_peerdir_peernode_destroyed"]
 [connection signal="peernode_identified" from="PeerNodeDirectory" to="." method="_on_peerdir_peernode_identified"]
+[connection signal="child_entered_tree" from="PlayerNodeDirectory" to="." method="_on_playerdir_playernode_created"]
+[connection signal="child_exiting_tree" from="PlayerNodeDirectory" to="." method="_on_playerdir_playernode_destroyed"]
 [connection signal="playernode_color_changed" from="PlayerNodeDirectory" to="." method="_on_playerdir_playernode_color_changed"]
 [connection signal="playernode_name_changed" from="PlayerNodeDirectory" to="." method="_on_playerdir_playernode_name_changed"]
 [connection signal="playernode_possessed" from="PlayerNodeDirectory" to="." method="_on_playerdir_playernode_possessed"]

scenes/lobby_menu.gd

@@ -5,11 +5,12 @@ class_name LobbyMenu
 signal leave_confirmed
 signal start_confirmed
 
-@onready var players_list: PlayersList = $"Layout/PlayersList"
 
+var players_list: Container
+
+func init_refs():
+	players_list = $"Layout/PlayersList"
 
-func _on_trackers_changed(trackers: Dictionary):
-	players_list._on_trackers_changed(trackers)
 
 func _on_leave_button_pressed() -> void:
 	leave_confirmed.emit()

scenes/main.gd

@@ -74,14 +74,17 @@ func init_lobby_menu():
 	lobby_menu_instance = lobby_menu_scene.instantiate()
 	lobby_menu_instance.leave_confirmed.connect(_on_leave_confirmed)
 	lobby_menu_instance.start_confirmed.connect(_on_start_confirmed)
-	interface_instance.add_child(lobby_menu_instance)
+	lobby_menu_instance.init_refs()
+	client_game_instance.multiplayer.server_disconnected.connect(_on_leave_confirmed)
 	client_game_instance.player_dir.child_entered_tree.connect(lobby_menu_instance.players_list._on_playernode_created)
 	client_game_instance.player_dir.child_exiting_tree.connect(lobby_menu_instance.players_list._on_playernode_destroyed)
 	client_game_instance.player_dir.playernode_name_changed.connect(lobby_menu_instance.players_list._on_playernode_name_changed)
 	client_game_instance.player_dir.playernode_color_changed.connect(lobby_menu_instance.players_list._on_playernode_color_changed)
 	client_game_instance.player_dir.playernode_possessed.connect(lobby_menu_instance.players_list._on_playernode_possessed)
+	interface_instance.add_child(lobby_menu_instance)
 
 func deinit_lobby_menu():
+	client_game_instance.multiplayer.server_disconnected.disconnect(_on_leave_confirmed)
 	client_game_instance.player_dir.child_entered_tree.disconnect(lobby_menu_instance.players_list._on_playernode_created)
 	client_game_instance.player_dir.child_exiting_tree.disconnect(lobby_menu_instance.players_list._on_playernode_destroyed)
 	client_game_instance.player_dir.playernode_name_changed.disconnect(lobby_menu_instance.players_list._on_playernode_name_changed)

scenes/network_controller.gd

@@ -1,17 +0,0 @@
-extends Node
-class_name NetworkController
-
-
-@export var port = 12345
-
-
-func start_server() -> ENetMultiplayerPeer:
-	var peer = ENetMultiplayerPeer.new()
-	peer.create_server(port, 32)
-	return peer
-
-
-func start_client() -> ENetMultiplayerPeer:
-	var peer = ENetMultiplayerPeer.new()
-	peer.create_client("127.0.0.1", port)
-	return peer

scenes/network_controller.tscn

@@ -1,6 +1,24 @@
-[gd_scene load_steps=2 format=3 uid="uid://ddmiruki5mjn2"]
+[gd_scene load_steps=2 format=3 uid="uid://d25h11x5grlnn"]
 
-[ext_resource type="Script" path="res://scenes/network_controller.gd" id="1_2jxjv"]
+[sub_resource type="GDScript" id="GDScript_nrktq"]
+script/source = "extends Node
+class_name NetworkController
+
+
+@export var port = 12345
+
+
+func start_server() -> ENetMultiplayerPeer:
+	var peer = ENetMultiplayerPeer.new()
+	peer.create_server(port, 32)
+	return peer
+
+
+func start_client() -> ENetMultiplayerPeer:
+	var peer = ENetMultiplayerPeer.new()
+	peer.create_client(\"127.0.0.1\", port)
+	return peer
+"
 
 [node name="NetworkController" type="Node"]
-script = ExtResource("1_2jxjv")
+script = SubResource("GDScript_nrktq")

scenes/peernode_directory.gd

@@ -6,15 +6,9 @@ class_name PeerNodeDirectory
 @export var peernode_scene: PackedScene = preload("res://scenes/peernode.tscn")
 
 
-## Cache dictionary mapping peer_ids to their respective [PeerNode].
-##
-## This script is responsible for keeping it updated.
-var peernodes_by_id: Dictionary = {}
-
-
 ## Find the subordinate [PeerNode] with the given peer_id, and return it if found, otherwise return null.
 func get_peernode(peer_id: int) -> PeerNode:
-	return peernodes_by_id.get(peer_id) as PeerNode
+	return get_node_or_null("%d" % peer_id)
 
 
 ## Create a new [PeerNode] for the given peer_id, or do nothing if it already exists.
@@ -26,10 +20,10 @@ func rpc_create_peernode(peer_id: int):
 		return
 	# Create a new peernode
 	peernode = peernode_scene.instantiate()
-	peernodes_by_id[peer_id] = peernode
 	peernode.set_multiplayer_authority(peer_id)
 	peernode.identified.connect(_on_peernode_identified.bind(peernode))
-	add_child(peernode, true)
+	peernode.name = "%d" % peer_id
+	add_child(peernode)
 
 
 ## Destroy the [PeerNode] for the given peer_id, or do nothing if it does not exist.

scenes/playernode.gd

@@ -2,6 +2,11 @@ extends Node
 class_name PlayerNode
 
 
+## Remove problematic characters from the player's name
+static func sanitize_player_name(s: String) -> String:
+	return s.replace("/", "_").replace("*", "_").replace(" ", "_")
+
+
 ## The name of the player represented by this node.
 var player_name: String
 
@@ -13,7 +18,8 @@ var player_color: Color
 func rpc_set_name(value: String):
 	if player_name != value:
 		var old_value: String = player_name
-		player_name = value
+		player_name = PlayerNode.sanitize_player_name(value)
+		name = PlayerNode.sanitize_player_name(value)
 		name_changed.emit(old_value, value)
 
 ## Change the [field player_color] everywhere.

scenes/playernode_directory.gd

@@ -6,15 +6,10 @@ class_name PlayerNodeDirectory
 @export var playernode_scene: PackedScene = preload("res://scenes/playernode.tscn")
 
 
-## Cache dictionary mapping player names to their respective [PlayerNode].
-##
-## This script is responsible for keeping it updated.
-var playernodes_by_name: Dictionary = {}
-
-
 ## Find the subordinate [PlayerNode] with the given player_name, and return it if found, otherwise return null.
 func get_playernode(player_name: String) -> PlayerNode:
-	return playernodes_by_name.get(player_name)
+	var sanitized_player_name = PlayerNode.sanitize_player_name(player_name)
+	return get_node_or_null(sanitized_player_name)
 
 
 ## Create a new [PlayerNode] for the given [param player_name], giving control of it to [param peer_id].
@@ -31,15 +26,16 @@ func rpc_possess_playernode(player_name: String, peer_id: int):
 		playernode.name_changed.connect(_on_playernode_name_changed.bind(playernode))
 		playernode.color_changed.connect(_on_playernode_color_changed.bind(playernode))
 		playernode.possessed.connect(_on_playernode_possessed.bind(playernode))
-		add_child(playernode, true)
+		var sanitized_player_name = PlayerNode.sanitize_player_name(player_name)
+		playernode.player_name = sanitized_player_name
+		playernode.name = sanitized_player_name
+		add_child(playernode)
 	# If the multiplayer authority does not match the requested one, make it match
 	playernode.possess(peer_id)
 
 
 
 func _on_playernode_name_changed(old: String, new: String, playernode: PlayerNode):
-	playernodes_by_name.erase(old)
-	playernodes_by_name[new] = playernode
 	playernode_name_changed.emit(old, new, playernode)
 
 func _on_playernode_color_changed(old: Color, new: Color, playernode: PlayerNode):

scenes/players_list.gd

@@ -11,6 +11,9 @@ var labels_by_playernode: Dictionary = {}
 
 func _on_playernode_created(playernode: PlayerNode) -> void:
 	var label_instance = label_scene.instantiate()
+	label_instance.set_player_name(playernode.player_name)
+	label_instance.set_player_color(playernode.player_color)
+	label_instance.set_possessed(playernode.get_multiplayer_authority())
 	labels_by_playernode[playernode] = label_instance
 	layout.add_child(label_instance)
 

utils/log.gd

@@ -3,4 +3,4 @@ class_name Log
 
 
 static func peer(this: Node, string: String):
-	print("{", this.multiplayer.multiplayer_peer.get_unique_id(), "} ", string)
+	print("{", this.multiplayer.multiplayer_peer.get_unique_id(), "} [", str(this), "] ", string)