diff --git a/OpenRA.Game/Server/Server.cs b/OpenRA.Game/Server/Server.cs
index 96f8af04ac..d8fc8ad550 100644
--- a/OpenRA.Game/Server/Server.cs
+++ b/OpenRA.Game/Server/Server.cs
@@ -590,8 +590,10 @@ namespace OpenRA.Server
 
 				DispatchOrders(toDrop, frame, new byte[] { 0xbf });
 
+				// All clients have left: clean up
 				if (!Conns.Any())
-					TempBans.Clear();
+					foreach (var t in serverTraits.WithInterface<INotifyServerEmpty>())
+						t.ServerEmpty(this);
 
 				if (Conns.Any() || Dedicated)
 					SyncLobbyClients();
diff --git a/OpenRA.Game/Server/TraitInterfaces.cs b/OpenRA.Game/Server/TraitInterfaces.cs
index 8f3c0cc707..8065bc9424 100644
--- a/OpenRA.Game/Server/TraitInterfaces.cs
+++ b/OpenRA.Game/Server/TraitInterfaces.cs
@@ -18,6 +18,7 @@ namespace OpenRA.Server
 	public interface IInterpretCommand { bool InterpretCommand(Server server, Connection conn, Session.Client client, string cmd); }
 	public interface INotifySyncLobbyInfo { void LobbyInfoSynced(Server server); }
 	public interface INotifyServerStart { void ServerStarted(Server server); }
+	public interface INotifyServerEmpty { void ServerEmpty(Server server); }
 	public interface INotifyServerShutdown { void ServerShutdown(Server server); }
 	public interface IStartGame { void GameStarted(Server server); }
 	public interface IClientJoined { void ClientJoined(Server server, Connection conn); }
diff --git a/OpenRA.Mods.Common/ServerTraits/LobbyCommands.cs b/OpenRA.Mods.Common/ServerTraits/LobbyCommands.cs
index ba15c6ddf9..2238b75053 100644
--- a/OpenRA.Mods.Common/ServerTraits/LobbyCommands.cs
+++ b/OpenRA.Mods.Common/ServerTraits/LobbyCommands.cs
@@ -11,9 +11,7 @@
 
 using System;
 using System.Collections.Generic;
-using System.Drawing;
 using System.Linq;
-using System.Threading;
 using OpenRA.Graphics;
 using OpenRA.Mods.Common.Traits;
 using OpenRA.Network;
@@ -23,7 +21,7 @@ using S = OpenRA.Server.Server;
 
 namespace OpenRA.Mods.Common.Server
 {
-	public class LobbyCommands : ServerTrait, IInterpretCommand, INotifyServerStart, IClientJoined
+	public class LobbyCommands : ServerTrait, IInterpretCommand, INotifyServerStart, INotifyServerEmpty, IClientJoined
 	{
 		static bool ValidateSlotCommand(S server, Connection conn, Session.Client client, string arg, bool requiresHost)
 		{
@@ -871,6 +869,21 @@ namespace OpenRA.Mods.Common.Server
 				server.SendOrderTo(conn, "Message", briefing);
 		}
 
+		void INotifyServerEmpty.ServerEmpty(S server)
+		{
+			// Expire any temporary bans
+			server.TempBans.Clear();
+
+			// Re-enable spectators
+			server.LobbyInfo.GlobalSettings.AllowSpectators = true;
+
+			// Reset player slots
+			server.LobbyInfo.Slots = server.Map.Players.Players
+				.Select(p => MakeSlotFromPlayerReference(p.Value))
+				.Where(ss => ss != null)
+				.ToDictionary(ss => ss.PlayerReference, ss => ss);
+		}
+
 		public PlayerReference PlayerReferenceForSlot(S server, Session.Slot slot)
 		{
 			if (slot == null)