Fix: Default components breaking item stacking while crafting.

core/src/main/java/org/geysermc/geyser/entity/type/ItemFrameEntity.java

@@ -118,17 +118,7 @@ public class ItemFrameEntity extends Entity {
             NbtMapBuilder builder = NbtMap.builder();
             builder.putByte("Count", (byte) itemData.getCount());
             NbtMap itemDataTag = itemData.getTag();
-            if (itemDataTag != null) {
-                // Remove custom name that Geyser sets for items due to translating default components
-                String customName = ItemTranslator.getCustomName(session, heldItem.getDataComponents(),
-                    session.getItemMappings().getMapping(heldItem), 'f', false);
-                if (customName == null) {
-                    // No custom name found, must modify tag if custom name exists
-                    NbtMapBuilder copy = itemDataTag.toBuilder();
-                    copy.remove("display"); // Also removes lore, but, should not matter
-                    itemDataTag = copy.build();
-                }
-
+            if (itemData.getTag() != null) {
                 builder.put("tag", itemDataTag);
             }
             builder.putShort("Damage", (short) itemData.getDamage());

core/src/main/java/org/geysermc/geyser/item/type/Item.java

@@ -191,7 +191,9 @@ public class Item {
         }
 
         Integer repairCost = components.get(DataComponentType.REPAIR_COST);
-        if (repairCost != null) {
+        // Java sets repair cost to 0 on all items via default components, that trips up Bedrock crafting.
+        // See https://github.com/GeyserMC/Geyser/issues/5220 for more details
+        if (repairCost != null && repairCost != 0) {
             builder.putInt("RepairCost", repairCost);
         }
 
@@ -202,7 +204,12 @@ public class Item {
 
         // Prevents the client from trying to stack items with untranslated components
         // Relies on correct hash code implementation, and some luck
-        builder.putInt("GeyserHash", components.hashCode()); // TODO: don't rely on this
+        // However, we should only set a hash when the components differ from the default ones,
+        // otherwise Bedrock can't stack these when crafting items since it's predicted recipe output
+        // does not contain the GeyserHash. See https://github.com/GeyserMC/Geyser/issues/5220 for more details
+        if (!baseComponents.equals(components)) {
+            builder.putInt("GeyserHash", components.hashCode()); // TODO: don't rely on this
+        }
     }
 
     /**

core/src/main/java/org/geysermc/geyser/translator/inventory/InventoryTranslator.java

@@ -246,7 +246,7 @@ public abstract class InventoryTranslator {
                     boolean isSourceCursor = isCursor(transferAction.getSource());
                     boolean isDestCursor = isCursor(transferAction.getDestination());
 
-                    if ((this) instanceof PlayerInventoryTranslator) {
+                    if (this instanceof PlayerInventoryTranslator) {
                         if (destSlot == 5) {
                             //only set the head if the destination is the head slot
                             GeyserItemStack javaItem = inventory.getItem(sourceSlot);

core/src/main/java/org/geysermc/geyser/translator/item/BedrockItemBuilder.java

@@ -122,12 +122,13 @@ public final class BedrockItemBuilder {
      */
     @Nullable
     public NbtMap build() {
-        if (customName != null || lore != null) {
+        boolean validLore = lore != null && !lore.isEmpty();
+        if (customName != null || validLore) {
             NbtMapBuilder display = NbtMap.builder();
             if (customName != null) {
                 display.putString("Name", customName);
             }
-            if (lore != null) {
+            if (validLore) {
                 display.putList("Lore", NbtType.STRING, lore);
             }
             getOrCreateNbt().put("display", display.build());

core/src/main/java/org/geysermc/geyser/translator/item/ItemTranslator.java

@@ -173,7 +173,7 @@ public final class ItemTranslator {
         javaItem.translateComponentsToBedrock(session, components, nbtBuilder);
 
         Rarity rarity = Rarity.fromId(components.getOrDefault(DataComponentType.RARITY, 0));
-        String customName = getCustomName(session, components, bedrockItem, rarity.getColor(), true);
+        String customName = getCustomName(session, components, bedrockItem, rarity.getColor(), false);
         if (customName != null) {
             nbtBuilder.setCustomName(customName);
         }