src/main/java/eu/mhsl/minenet/minigames/instance/game/stateless/types/colorJump/ColorJump.java

@@ -10,6 +10,7 @@ import net.minestom.server.coordinate.Pos;
 import net.minestom.server.entity.GameMode;
 import net.minestom.server.event.inventory.InventoryPreClickEvent;
 import net.minestom.server.event.player.PlayerMoveEvent;
+import net.minestom.server.event.player.PlayerSwapItemEvent;
 import net.minestom.server.instance.batch.AbsoluteBlockBatch;
 import net.minestom.server.instance.block.Block;
 import net.minestom.server.item.ItemStack;
@@ -47,6 +48,11 @@ public class ColorJump extends StatelessGame {
             InventoryPreClickEvent.class,
             inventoryPreClickEvent -> inventoryPreClickEvent.setCancelled(true)
         );
+
+        this.eventNode().addListener(
+            PlayerSwapItemEvent.class,
+            playerSwapItemEvent -> playerSwapItemEvent.setCancelled(true)
+        );
     }
 
     @Override