From fe0fde009bda501f0b7199c9339bb93986a86270 Mon Sep 17 00:00:00 2001
From: Technici4n <13494793+Technici4n@users.noreply.github.com>
Date: Sat, 3 Aug 2024 12:21:47 +0200
Subject: [PATCH] Fix #143: Battery dupe when inserting in ender cell (#177)

---
 .../owmii/powah/lib/logistics/inventory/ItemStackHandler.java  | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/main/java/owmii/powah/lib/logistics/inventory/ItemStackHandler.java b/src/main/java/owmii/powah/lib/logistics/inventory/ItemStackHandler.java
index 2158fa4..f0df002 100644
--- a/src/main/java/owmii/powah/lib/logistics/inventory/ItemStackHandler.java
+++ b/src/main/java/owmii/powah/lib/logistics/inventory/ItemStackHandler.java
@@ -78,7 +78,8 @@ public ItemStack insertItem(int slot, @NotNull ItemStack stack, boolean simulate
 
         if (!simulate) {
             if (existing.isEmpty()) {
-                this.stacks.set(slot, reachedLimit ? ItemStackHandlerHelper.copyStackWithSize(stack, limit) : stack);
+                // We must always copy the stack because onContentsChanged might change it, messing with our later use.
+                this.stacks.set(slot, reachedLimit ? ItemStackHandlerHelper.copyStackWithSize(stack, limit) : stack.copy());
             } else {
                 existing.grow(reachedLimit ? limit : stack.getCount());
             }