craftbukkit/nms-patches/net/minecraft/world/inventory/ContainerLoom.patch

--- a/net/minecraft/world/inventory/ContainerLoom.java
+++ b/net/minecraft/world/inventory/ContainerLoom.java
@@ -23,8 +23,30 @@
 import net.minecraft.world.level.block.entity.BannerPatternLayers;
 import net.minecraft.world.level.block.entity.EnumBannerPatternType;
 
+// CraftBukkit start
+import org.bukkit.Location;
+import org.bukkit.craftbukkit.inventory.CraftInventoryLoom;
+import org.bukkit.craftbukkit.inventory.view.CraftLoomView;
+import org.bukkit.entity.Player;
+// CraftBukkit end
+
 public class ContainerLoom extends Container {
 
+    // CraftBukkit start
+    private CraftLoomView bukkitEntity = null;
+    private Player player;
+
+    @Override
+    public CraftLoomView getBukkitView() {
+        if (bukkitEntity != null) {
+            return bukkitEntity;
+        }
+
+        CraftInventoryLoom inventory = new CraftInventoryLoom(this.inputContainer, this.outputContainer);
+        bukkitEntity = new CraftLoomView(this.player, inventory, this);
+        return bukkitEntity;
+    }
+    // CraftBukkit end
     private static final int PATTERN_NOT_SET = -1;
     private static final int INV_SLOT_START = 4;
     private static final int INV_SLOT_END = 31;
@@ -60,6 +82,13 @@
                 ContainerLoom.this.slotsChanged(this);
                 ContainerLoom.this.slotUpdateListener.run();
             }
+
+            // CraftBukkit start
+            @Override
+            public Location getLocation() {
+                return containeraccess.getLocation();
+            }
+            // CraftBukkit end
         };
         this.outputContainer = new InventorySubcontainer(1) {
             @Override
@@ -67,6 +96,13 @@
                 super.setChanged();
                 ContainerLoom.this.slotUpdateListener.run();
             }
+
+            // CraftBukkit start
+            @Override
+            public Location getLocation() {
+                return containeraccess.getLocation();
+            }
+            // CraftBukkit end
         };
         this.access = containeraccess;
         this.bannerSlot = this.addSlot(new Slot(this.inputContainer, 0, 13, 26) {
@@ -116,10 +152,12 @@
         this.addStandardInventorySlots(playerinventory, 8, 84);
         this.addDataSlot(this.selectedBannerPatternIndex);
         this.patternGetter = playerinventory.player.registryAccess().lookupOrThrow(Registries.BANNER_PATTERN);
+        player = (Player) playerinventory.player.getBukkitEntity(); // CraftBukkit
     }
 
     @Override
     public boolean stillValid(EntityHuman entityhuman) {
+        if (!this.checkReachable) return true; // CraftBukkit
         return stillValid(this.access, entityhuman, Blocks.LOOM);
     }
 
@@ -288,6 +326,11 @@
             EnumColor enumcolor = ((ItemDye) itemstack1.getItem()).getDyeColor();
 
             itemstack2.update(DataComponents.BANNER_PATTERNS, BannerPatternLayers.EMPTY, (bannerpatternlayers) -> {
+                // CraftBukkit start
+                if (bannerpatternlayers.layers().size() > 20) {
+                    bannerpatternlayers = new BannerPatternLayers(List.copyOf(bannerpatternlayers.layers().subList(0, 20)));
+                }
+                // CraftBukkit end
                 return (new BannerPatternLayers.a()).addAll(bannerpatternlayers).add(holder, enumcolor).build();
             });
         }