Item.SetContainedItemPositions recursively sets the positions of the items contained inside the contained items (and so on)

Subsurface/Source/Items/Item.cs

@@ -609,6 +609,8 @@ namespace Barotrauma
 
                 contained.Submarine = Submarine;
                 contained.CurrentHull = CurrentHull;
+
+                contained.SetContainedItemPositions();
             }
         }