diff --git a/src/ship/packet/handler/room.rs b/src/ship/packet/handler/room.rs
index 6bef6b9..b02d28b 100644
--- a/src/ship/packet/handler/room.rs
+++ b/src/ship/packet/handler/room.rs
@@ -77,6 +77,9 @@ pub fn join_room(id: ClientId,
 
     let client = clients.get(&id).ok_or(ShipError::ClientNotFound(id))?;
     let area_client = client_location.get_local_client(id).map_err(|err| -> ClientLocationError { err.into() })?;
+
+    item_manager.add_character_to_room(room_id, &client.character, area_client);
+
     let leader = client_location.get_room_leader(room_id).map_err(|err| -> ClientLocationError { err.into() })?;
     let join_room = builder::room::join_room(id, clients, client_location, room_id, &room)?;
     let add_to = builder::room::add_to_room(id, &client, &area_client, &leader, item_manager, level_table, room_id)?;
@@ -84,8 +87,6 @@ pub fn join_room(id: ClientId,
     let room = rooms.get_mut(room_id.0).unwrap().as_mut().unwrap();
     room.bursting = true;
 
-    item_manager.add_character_to_room(room_id, &client.character, area_client);
-
     let mut result: Box<dyn Iterator<Item=(ClientId, SendShipPacket)> + Send> = Box::new(
         vec![(id, SendShipPacket::JoinRoom(join_room))]
             .into_iter()
diff --git a/tests/common.rs b/tests/common.rs
index 7e7c925..6b97b0e 100644
--- a/tests/common.rs
+++ b/tests/common.rs
@@ -59,6 +59,13 @@ pub async fn create_room<EG: EntityGateway>(ship: &mut ShipServerState<EG>, id:
     create_room_with_difficulty(ship, id, name, password, Difficulty::Normal).await;
 }
 
+pub async fn leave_room<EG: EntityGateway>(ship: &mut ShipServerState<EG>, id: ClientId) {
+    ship.handle(id, &RecvShipPacket::LobbySelect(LobbySelect {
+        menu: 3,
+        lobby: 0,
+    })).await.unwrap().for_each(drop);
+}
+
 pub async fn create_room_with_difficulty<EG: EntityGateway>(ship: &mut ShipServerState<EG>, id: ClientId, name: &str, password: &str, difficulty: Difficulty) {
     ship.handle(id, &RecvShipPacket::CreateRoom(CreateRoom {
         unknown: [0; 2],
@@ -79,4 +86,5 @@ pub async fn join_room<EG: EntityGateway>(ship: &mut ShipServerState<EG>, id: Cl
         menu: ROOM_MENU_ID,
         item: room_id,
     })).await.unwrap().for_each(drop);
+    ship.handle(id, &RecvShipPacket::DoneBursting(DoneBursting {})).await.unwrap().for_each(drop);
 }
diff --git a/tests/test_rooms.rs b/tests/test_rooms.rs
new file mode 100644
index 0000000..a21c754
--- /dev/null
+++ b/tests/test_rooms.rs
@@ -0,0 +1,104 @@
+use elseware::common::serverstate::{ClientId, ServerState};
+use elseware::entity::gateway::{EntityGateway, InMemoryGateway};
+use elseware::entity::item;
+use elseware::ship::ship::{ShipServerState, RecvShipPacket, SendShipPacket};
+
+use libpso::packet::ship::*;
+use libpso::packet::messages::*;
+
+#[path = "common.rs"]
+mod common;
+use common::*;
+
+
+#[async_std::test]
+async fn test_item_ids_reset_when_rejoining_rooms() {
+    let mut entity_gateway = InMemoryGateway::new();
+
+    let (_user1, char1) = new_user_character(&mut entity_gateway, "a1", "a").await;
+    let (_user2, char2) = new_user_character(&mut entity_gateway, "a2", "a").await;
+
+    for slot in 0..3 {
+        entity_gateway.create_item(
+            item::NewItemEntity {
+                item: item::ItemDetail::Weapon(
+                    item::weapon::Weapon {
+                        weapon: item::weapon::WeaponType::Saber,
+                        grind: 0,
+                        special: None,
+                        attrs: [None, None, None],
+                        tekked: true,
+                        modifiers: Vec::new(),
+                    }
+                ),
+                location: item::ItemLocation::Inventory {
+                    character_id: char1.id,
+                    slot: slot,
+                    equipped: false,
+                }
+            }).await.unwrap();
+    }
+
+    for slot in 0..10 {
+        entity_gateway.create_item(
+            item::NewItemEntity {
+                item: item::ItemDetail::Weapon(
+                    item::weapon::Weapon {
+                        weapon: item::weapon::WeaponType::Saber,
+                        grind: 0,
+                        special: None,
+                        attrs: [None, None, None],
+                        tekked: true,
+                        modifiers: Vec::new(),
+                    }
+                ),
+                location: item::ItemLocation::Inventory {
+                    character_id: char2.id,
+                    slot: slot,
+                    equipped: false,
+                }
+            }).await.unwrap();
+    }
+
+    let mut ship = ShipServerState::builder()
+        .gateway(entity_gateway.clone())
+        .build();
+    log_in_char(&mut ship, ClientId(1), "a1", "a").await;
+    log_in_char(&mut ship, ClientId(2), "a2", "a").await;
+
+    join_lobby(&mut ship, ClientId(1)).await;
+    join_lobby(&mut ship, ClientId(2)).await;
+
+    create_room(&mut ship, ClientId(1), "room", "").await;
+    let p = ship.handle(ClientId(2), &RecvShipPacket::MenuSelect(MenuSelect {
+        menu: ROOM_MENU_ID,
+        item: 0,
+    })).await.unwrap().collect::<Vec<_>>();
+    ship.handle(ClientId(2), &RecvShipPacket::DoneBursting(DoneBursting {})).await.unwrap().for_each(drop);
+
+    match &p[1].1 {
+        SendShipPacket::AddToRoom(add_to) => {
+            println!("addto {:?}", add_to);
+            assert_eq!(add_to.playerinfo.inventory.items.iter().map(|k| k.item_id).collect::<Vec<_>>(),
+                       vec![0x210000,0x210001,0x210002,0x210003,0x210004,0x210005,0x210006,0x210007,0x210008,0x210009,
+                            0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]);
+        },
+        _ => panic!(),
+    }
+
+    leave_room(&mut ship, ClientId(2)).await;
+
+    let p = ship.handle(ClientId(2), &RecvShipPacket::MenuSelect(MenuSelect {
+        menu: ROOM_MENU_ID,
+        item: 0,
+    })).await.unwrap().collect::<Vec<_>>();
+
+    match &p[1].1 {
+        SendShipPacket::AddToRoom(add_to) => {
+            assert_eq!(add_to.playerinfo.inventory.items.iter().map(|k| k.item_id).collect::<Vec<_>>(),
+                       vec![0x210000,0x210001,0x210002,0x210003,0x210004,0x210005,0x210006,0x210007,0x210008,0x210009,
+                            0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]);
+        },
+        _ => panic!(),
+    }
+}