Fixed PERSISTED_THROUGH_ROUNDS not being updated

src/ShipInventoryUpdated/Patches/RoundManager_Patches.cs

@@ -0,0 +1,23 @@
+using HarmonyLib;
+using ShipInventoryUpdated.Helpers;
+using ShipInventoryUpdated.Scripts;
+
+// ReSharper disable InconsistentNaming
+
+namespace ShipInventoryUpdated.Patches;
+
+[HarmonyPatch(typeof(RoundManager))]
+internal class RoundManager_Patches
+{
+	[HarmonyPatch(nameof(RoundManager.DespawnPropsAtEndOfRound))]
+	[HarmonyPostfix]
+	private static void DespawnPropsAtEndOfRound_Postfix(RoundManager __instance)
+	{
+		if (!__instance.IsServer)
+			return;
+
+		var itemsToUpdate = Inventory.Items.Where(item => !item.PERSISTED_THROUGH_ROUNDS).ToArray();
+
+		Inventory.MarkPersisted(itemsToUpdate);
+	}
+}

src/ShipInventoryUpdated/Scripts/Inventory.cs

@@ -88,6 +88,20 @@ public static ItemData[] Items
 		}
 	}
 
+	/// <summary>
+	/// Marks the items as they persisted through rounds
+	/// </summary>
+	public static void MarkPersisted(ItemData[] items)
+	{
+		if (_instance == null)
+		{
+			Logger.Warn("Tried to modify items in the inventory, but no instance was defined.");
+			return;
+		}
+
+		_instance.MarkPersistedServerRpc(items);
+	}
+
 	#endregion
 
 	#region Unity
@@ -133,5 +147,22 @@ private void ClearServerRpc()
 		_storedItems.Clear();
 	}
 
+	[ServerRpc(RequireOwnership = false)]
+	private void MarkPersistedServerRpc(params ItemData[] items)
+	{
+		var newItems = new HashSet<ItemData>(items);
+
+		for (var i = 0; i < _storedItems.Count; i++)
+		{
+			var item = _storedItems[i];
+
+			if (!newItems.Contains(item))
+				continue;
+
+			item.PERSISTED_THROUGH_ROUNDS = true;
+			_storedItems[i] = item;
+		}
+	}
+
 	#endregion
 }

src/ShipInventoryUpdated/ShipInventoryUpdated.cs

@@ -74,6 +74,7 @@ private void Patch()
 	{
 		_harmony = new Harmony(MyPluginInfo.PLUGIN_GUID);
 		_harmony.PatchAll(typeof(Patches.GameNetworkManager_Patches));
+		_harmony.PatchAll(typeof(Patches.RoundManager_Patches));
 		_harmony.PatchAll(typeof(Patches.StartOfRound_Patches));
 		_harmony.PatchAll(typeof(Patches.Terminal_Patches));
 	}