diff --git a/src/main/java/me/jellysquid/mods/lithium/common/entity/item/ElementCategorizingList.java b/src/main/java/me/jellysquid/mods/lithium/common/entity/item/ElementCategorizingList.java
index c88601ac7..b74e17a9d 100644
--- a/src/main/java/me/jellysquid/mods/lithium/common/entity/item/ElementCategorizingList.java
+++ b/src/main/java/me/jellysquid/mods/lithium/common/entity/item/ElementCategorizingList.java
@@ -33,6 +33,7 @@ protected void initialize() {
     }
 
     abstract Category getCategory(T element);
+    abstract boolean areSubcategoriesAlwaysEmpty(Category category);
     abstract boolean isSubCategoryA(T element);
     abstract boolean isSubCategoryB(T element);
     abstract void onElementSubcategorized(T element, int index);
@@ -96,7 +97,7 @@ public LazyIterationConsumer.NextIteration consumeCategory(LazyIterationConsumer
 
     public LazyIterationConsumer.NextIteration consumeCategoryA(LazyIterationConsumer<T> elementConsumer, Category category) {
         IntArrayList categoryList = this.elementsByTypeA.get(category);
-        if (categoryList == null) {
+        if (categoryList == null && !this.areSubcategoriesAlwaysEmpty(category)) {
             categoryList = this.elementsByType.get(category);
         }
 
@@ -105,7 +106,7 @@ public LazyIterationConsumer.NextIteration consumeCategoryA(LazyIterationConsume
 
     public LazyIterationConsumer.NextIteration consumeCategoryB(LazyIterationConsumer<T> elementConsumer, Category category) {
         IntArrayList categoryList = this.elementsByTypeB.get(category);
-        if (categoryList == null) {
+        if (categoryList == null && !this.areSubcategoriesAlwaysEmpty(category)) {
             categoryList = this.elementsByType.get(category);
         }
 
@@ -136,6 +137,10 @@ private LazyIterationConsumer.NextIteration consumeElements(LazyIterationConsume
     }
 
     private void initSubCategories(Category category, IntArrayList source) {
+        if (this.areSubcategoriesAlwaysEmpty(category)) {
+            return;
+        }
+
         IntArrayList categoryListA = new IntArrayList();
         IntArrayList categoryListB = new IntArrayList();
         this.elementsByTypeA.put(category, categoryListA);
diff --git a/src/main/java/me/jellysquid/mods/lithium/common/entity/item/ItemEntityCategorizingList.java b/src/main/java/me/jellysquid/mods/lithium/common/entity/item/ItemEntityCategorizingList.java
index d4122c68b..2c7fa28f8 100644
--- a/src/main/java/me/jellysquid/mods/lithium/common/entity/item/ItemEntityCategorizingList.java
+++ b/src/main/java/me/jellysquid/mods/lithium/common/entity/item/ItemEntityCategorizingList.java
@@ -40,6 +40,11 @@ Item getCategory(ItemStack itemStack) {
         return ((ItemStackAccessor) (Object) itemStack).lithium$getItem();
     }
 
+    @Override
+    boolean areSubcategoriesAlwaysEmpty(Item item) {
+        return item.getMaxCount() == 1;
+    }
+
     // If there are enough item entities in one category, divide the item entities into 3 buckets:
     // Stacks that are more than 50% full can only merge with stacks that are less than 50% full, etc.
     // Buckets:        A           B            *