From bf82b93dbf2a5ac03f08b39e91765ff7a298e0c8 Mon Sep 17 00:00:00 2001
From: NichtStudioCode <51272202+NichtStudioCode@users.noreply.github.com>
Date: Sat, 30 Apr 2022 14:19:42 +0200
Subject: [PATCH] Clone ItemStack before modifying NBT data in
 BaseWindow#redrawItem

---
 .../main/java/de/studiocode/invui/window/impl/BaseWindow.java  | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/InvUI/src/main/java/de/studiocode/invui/window/impl/BaseWindow.java b/InvUI/src/main/java/de/studiocode/invui/window/impl/BaseWindow.java
index 13b3217..2dee112 100644
--- a/InvUI/src/main/java/de/studiocode/invui/window/impl/BaseWindow.java
+++ b/InvUI/src/main/java/de/studiocode/invui/window/impl/BaseWindow.java
@@ -68,6 +68,9 @@ public abstract class BaseWindow implements Window {
             
             // This makes every item unique to prevent Shift-DoubleClick "clicking" multiple items at the same time.
             if (itemStack.hasItemMeta()) {
+                // clone ItemStack in order to not modify the original
+                itemStack = itemStack.clone();
+                
                 ItemMeta itemMeta = itemStack.getItemMeta();
                 itemMeta.getPersistentDataContainer().set(SLOT_KEY, PersistentDataType.BYTE, (byte) index);
                 itemStack.setItemMeta(itemMeta);