diff --git a/server/gameserver/car.cc b/server/gameserver/car.cc
index 9730630..5cdb00d 100644
--- a/server/gameserver/car.cc
+++ b/server/gameserver/car.cc
@@ -149,6 +149,7 @@ void Car::GetOn(Human* passenger)
         driver_ = passenger;
         driver_->SetAttackDir(a8::Vec2::RIGHT);
         SetAttackDir(driver_->GetAttackDir());
+        room->TakeOnCarObject(GetEntityUniId());
     }
     passenger->SetCar(this);
     passenger->SetSeat(seat);
@@ -170,6 +171,7 @@ void Car::GetOn(Human* passenger)
         TryAddBuff(this, meta->car_active_buff_id);
     }
     SyncAroundPlayers(__FILE__, __LINE__, __func__);
+    room->NotifyUiUpdate();
 }
 
 void Car::SwitchSeat(Human* passenger, int seat)
@@ -310,6 +312,7 @@ void Car::DecHP(float dec_hp, int killer_id, const std::string& killer_name, int
 void Car::BeKill(int killer_id, const std::string& killer_name, int weapon_id)
 {
     dead = true;
+    room->TakeOnCarObject(GetEntityUniId());
     BroadcastDeleteState(room);
     RemoveFromAroundPlayers(room);
     room->grid_service->RemoveCreature(this);
diff --git a/server/gameserver/human.cc b/server/gameserver/human.cc
index 689e9fa..58509a8 100644
--- a/server/gameserver/human.cc
+++ b/server/gameserver/human.cc
@@ -3383,8 +3383,6 @@ void Human::DoGetOnWithLoot(Loot* entity)
                     team_id
                     );
     car->GetOn(this);
-    room->TakeOnCarObject(entity->GetEntityUniId());
-    room->NotifyUiUpdate();
     #ifdef DEBUG
     a8::XPrintf("DoGetOnWithLoot uniid:%d car_uniid:%d\n", {car->GetEntityUniId(), car->car_uniid});
     #endif
diff --git a/server/gameserver/metamgr.cc b/server/gameserver/metamgr.cc
index c32528b..2828fe9 100755
--- a/server/gameserver/metamgr.cc
+++ b/server/gameserver/metamgr.cc
@@ -520,6 +520,9 @@ private:
             MetaData::Buff& item = a8::FastAppend(buff_list);
             item.i = &meta;
             item.Init();
+            if (buff_hash.find(item.i->buff_id()) != buff_hash.end()) {
+                abort();
+            }
             buff_hash[item.i->buff_id()] = &item;
         }