diff --git a/Barotrauma/BarotraumaClient/Source/Networking/GameClient.cs b/Barotrauma/BarotraumaClient/Source/Networking/GameClient.cs
index 12396e460..9ca24580f 100644
--- a/Barotrauma/BarotraumaClient/Source/Networking/GameClient.cs
+++ b/Barotrauma/BarotraumaClient/Source/Networking/GameClient.cs
@@ -1973,7 +1973,8 @@ namespace Barotrauma.Networking
             msg.Write(true); msg.WritePadBits();
             msg.Write(savePath);
             msg.Write(mapSeed);
-            msg.Write(sub.FilePath);
+            msg.Write(sub.Name);
+            msg.Write(sub.MD5Hash.Hash);
 
             client.SendMessage(msg, NetDeliveryMethod.ReliableUnordered);
 
diff --git a/Barotrauma/BarotraumaServer/Source/GameSession/GameModes/MultiPlayerCampaign.cs b/Barotrauma/BarotraumaServer/Source/GameSession/GameModes/MultiPlayerCampaign.cs
index b94525388..14667cf7f 100644
--- a/Barotrauma/BarotraumaServer/Source/GameSession/GameModes/MultiPlayerCampaign.cs
+++ b/Barotrauma/BarotraumaServer/Source/GameSession/GameModes/MultiPlayerCampaign.cs
@@ -11,11 +11,11 @@ namespace Barotrauma
     {
         private List<CharacterCampaignData> characterData = new List<CharacterCampaignData>();
 
-        public static void StartNewCampaign(string savePath, string subName, string seed)
+        public static void StartNewCampaign(string savePath, string subPath, string seed)
         {
             if (string.IsNullOrWhiteSpace(savePath)) return;
 
-            GameMain.GameSession = new GameSession(new Submarine(subName, ""), savePath, 
+            GameMain.GameSession = new GameSession(new Submarine(subPath, ""), savePath, 
                 GameModePreset.List.Find(g => g.Identifier == "multiplayercampaign"));
             var campaign = ((MultiPlayerCampaign)GameMain.GameSession.GameMode);
             campaign.GenerateMap(seed);
diff --git a/Barotrauma/BarotraumaServer/Source/Networking/GameServer.cs b/Barotrauma/BarotraumaServer/Source/Networking/GameServer.cs
index 88c5a0712..f51fd45f1 100644
--- a/Barotrauma/BarotraumaServer/Source/Networking/GameServer.cs
+++ b/Barotrauma/BarotraumaServer/Source/Networking/GameServer.cs
@@ -715,23 +715,25 @@ namespace Barotrauma.Networking
                     {
                         string savePath = inc.ReadString();
                         string seed = inc.ReadString();
-                        string subPath = inc.ReadString();
+                        string subName = inc.ReadString();
+                        string subHash = inc.ReadString();
 
-                        if (!File.Exists(subPath))
+                        var matchingSub = Submarine.SavedSubmarines.FirstOrDefault(s => s.Name == subName && s.MD5Hash.Hash == subHash);
+
+                        if (matchingSub == null)
                         {
                             SendDirectChatMessage(
-                                TextManager.Get("CampaignStartFailedSubNotFound").Replace("[subpath]", subPath), 
+                                TextManager.Get("CampaignStartFailedSubNotFound").Replace("[subname]", subName), 
                                 connectedClient, ChatMessageType.MessageBox);
                         }
                         else
                         {
-                            if (connectedClient.HasPermission(ClientPermissions.SelectMode)) MultiPlayerCampaign.StartNewCampaign(savePath, subPath, seed);
+                            if (connectedClient.HasPermission(ClientPermissions.SelectMode)) MultiPlayerCampaign.StartNewCampaign(savePath, matchingSub.FilePath, seed);
                         }
                      }
                     else
                     {
                         string saveName = inc.ReadString();
-
                         if (connectedClient.HasPermission(ClientPermissions.SelectMode)) MultiPlayerCampaign.LoadCampaign(saveName);
                     }
                     break;
diff --git a/Barotrauma/BarotraumaShared/Source/Characters/Character.cs b/Barotrauma/BarotraumaShared/Source/Characters/Character.cs
index f1d72e0b4..74062db2e 100644
--- a/Barotrauma/BarotraumaShared/Source/Characters/Character.cs
+++ b/Barotrauma/BarotraumaShared/Source/Characters/Character.cs
@@ -1666,10 +1666,12 @@ namespace Barotrauma
                     focusedItem = null; 
                 }
                 findFocusedTimer -= deltaTime;
-            }            
+            }
 #endif
             //climb ladders automatically when pressing up/down inside their trigger area
-            if (SelectedConstruction == null && !AnimController.InWater && Screen.Selected != GameMain.SubEditorScreen)
+            Ladder currentLadder = SelectedConstruction?.GetComponent<Ladder>();
+            if ((SelectedConstruction == null || currentLadder != null) && 
+                !AnimController.InWater && Screen.Selected != GameMain.SubEditorScreen)
             {
                 bool climbInput = IsKeyDown(InputType.Up) || IsKeyDown(InputType.Down);
                 bool isControlled = Controlled == this;
@@ -1680,6 +1682,19 @@ namespace Barotrauma
                     float minDist = float.PositiveInfinity;
                     foreach (Ladder ladder in Ladder.List)
                     {
+                        if (ladder == currentLadder)
+                        {
+                            continue;
+                        }
+                        else if (currentLadder != null)
+                        {
+                            //only switch from ladder to another if the ladders are above the current ladders and pressing up, or vice versa
+                            if (ladder.Item.WorldPosition.Y > currentLadder.Item.WorldPosition.Y != IsKeyDown(InputType.Up))
+                            {
+                                continue;
+                            }
+                        }
+
                         if (CanInteractWith(ladder.Item, out float dist, checkLinked: false) && dist < minDist)
                         {
                             minDist = dist;
diff --git a/Barotrauma/BarotraumaShared/Source/Items/Components/Ladder.cs b/Barotrauma/BarotraumaShared/Source/Items/Components/Ladder.cs
index 572a9b66b..004b00809 100644
--- a/Barotrauma/BarotraumaShared/Source/Items/Components/Ladder.cs
+++ b/Barotrauma/BarotraumaShared/Source/Items/Components/Ladder.cs
@@ -5,16 +5,12 @@ namespace Barotrauma.Items.Components
 {
     class Ladder : ItemComponent
     {
-        private static List<Ladder> list = new List<Ladder>();
-        public static List<Ladder> List
-        {
-            get { return list; }
-        }
+        public static List<Ladder> List { get; } = new List<Ladder>();
 
         public Ladder(Item item, XElement element)
             : base(item, element)
         {
-            list.Add(this);
+            List.Add(this);
         }
 
         public override bool Select(Character character)
@@ -27,7 +23,7 @@ namespace Barotrauma.Items.Components
 
         protected override void RemoveComponentSpecific()
         {
-            list.Remove(this);
+            List.Remove(this);
         }
     }
 }