api/src/main/java/com/lishid/openinv/internal/ISpecialInventory.java

@@ -16,6 +16,7 @@
 
 package com.lishid.openinv.internal;
 
+import org.bukkit.entity.HumanEntity;
 import org.bukkit.entity.Player;
 import org.bukkit.inventory.Inventory;
 import org.jetbrains.annotations.NotNull;
@@ -48,4 +49,11 @@ public interface ISpecialInventory {
      */
     boolean isInUse();
 
+    /**
+     * Gets the Player associated with this ISpecialInventory.
+     *
+     * @return the HumanEntity
+     */
+    @NotNull HumanEntity getPlayer();
+
 }

internal/v1_16_R3/src/main/java/com/lishid/openinv/internal/v1_16_R3/SpecialEnderChest.java

@@ -80,6 +80,11 @@ public class SpecialEnderChest extends InventoryEnderChest implements ISpecialEn
         }
     }
 
+    @Override
+    public @NotNull Player getPlayer() {
+        return owner.getBukkitEntity();
+    }
+
     @Override
     public void update() {
         this.owner.getEnderChest().update();

internal/v1_16_R3/src/main/java/com/lishid/openinv/internal/v1_16_R3/SpecialPlayerInventory.java

@@ -212,6 +212,11 @@ public class SpecialPlayerInventory extends PlayerInventory implements ISpecialP
         this.playerOnline = false;
     }
 
+    @Override
+    public @NotNull HumanEntity getPlayer() {
+        return this.player.getBukkitEntity();
+    }
+
     @Override
     public ItemStack splitStack(int i, final int j) {
         List<ItemStack> list = this.items;

plugin/src/main/java/com/lishid/openinv/internal/OpenInventoryView.java

@@ -17,7 +17,6 @@
 package com.lishid.openinv.internal;
 
 import com.lishid.openinv.OpenInv;
-import java.util.Objects;
 import org.bukkit.entity.HumanEntity;
 import org.bukkit.entity.Player;
 import org.bukkit.event.inventory.InventoryType;
@@ -63,7 +62,7 @@ public class OpenInventoryView extends InventoryView {
     @Override
     public @NotNull String getTitle() {
         if (title == null) {
-            HumanEntity owner = (HumanEntity) Objects.requireNonNull(inventory.getBukkitInventory().getHolder());
+            HumanEntity owner = inventory.getPlayer();
 
             String localTitle = OpenInv.getPlugin(OpenInv.class)
                     .getLocalizedMessage(

plugin/src/main/java/com/lishid/openinv/listeners/InventoryListener.java

@@ -199,7 +199,7 @@ public class InventoryListener implements Listener {
         }
 
         // Only specially handle actions in the player's own inventory.
-        return !event.getWhoClicked().equals(event.getView().getTopInventory().getHolder());
+        return !event.getWhoClicked().equals(playerInventory.getPlayer());
     }
 
 }