fix

src/items/Inventories.cpp

@@ -51,6 +51,7 @@ std::shared_ptr<Inventory> Inventories::clone(int64_t id) {
     auto origptr = reinterpret_cast<const Inventory*>(original.get());
     auto clone = std::make_shared<Inventory>(*origptr);
     clone->setId(level.getWorld()->getNextInventoryId());
+    store(clone);
     return clone;
 }
 

src/items/Inventory.cpp

@@ -5,6 +5,10 @@
 Inventory::Inventory(int64_t id, size_t size) : id(id), slots(size) {
 }
 
+Inventory::Inventory(const Inventory& orig) {
+    this->slots = orig.slots;
+}
+
 ItemStack& Inventory::getSlot(size_t index) {
     return slots.at(index);
 }

src/items/Inventory.h

@@ -19,6 +19,8 @@ class Inventory : public Serializable {
 public:
     Inventory(int64_t id, size_t size);
 
+    Inventory(const Inventory& orig);
+
     ItemStack& getSlot(size_t index);
     size_t findEmptySlot(size_t begin=0, size_t end=-1) const;
     size_t findSlotByItem(itemid_t id, size_t begin=0, size_t end=-1);