- ItemContainers whose bodies are disabled don't set the positions of the contained items each frame (only once when the item is placed in the container)

- ItemContainers maintain a list of statuseffects that need to be applied on the contained items instead of constantly rechecking each item
- deactivating ItemContainers if they have no body and there are no statuseffects to apply

Subsurface/Source/Items/ItemInventory.cs

@@ -44,6 +44,27 @@ namespace Barotrauma
             return (item!=null && Items[i]==null && container.CanBeContained(item));
         }
 
+        public override bool TryPutItem(Item item, System.Collections.Generic.List<InvSlotType> allowedSlots = null, bool createNetworkEvent = true)
+        {
+            bool wasPut = base.TryPutItem(item, allowedSlots, createNetworkEvent);
+
+            if (wasPut)
+            {
+                foreach (Character c in Character.CharacterList)
+                {
+                    if (!c.HasSelectedItem(item)) continue;
+
+                    item.Unequip(c);
+                    break;
+                }
+
+                container.IsActive = true;
+                container.OnItemContained(item);
+            }
+
+            return wasPut;
+        }
+
         public override bool TryPutItem(Item item, int i, bool allowSwapping, bool createNetworkEvent)
         {
             bool wasPut = base.TryPutItem(item, i, allowSwapping, createNetworkEvent);
@@ -57,11 +78,18 @@ namespace Barotrauma
                     item.Unequip(c);
                     break;                    
                 }
-                //item.Container = container.Item;
+
                 container.IsActive = true;
+                container.OnItemContained(item);
             }
+
             return wasPut;
         }
 
+        public override void RemoveItem(Item item)
+        {
+            base.RemoveItem(item);
+            container.OnItemRemoved(item);
+        }
     }
 }