From 7b6f4b365b9edc45c76bc1b60699e4d91fe1508f Mon Sep 17 00:00:00 2001
From: themode <themode@outlook.fr>
Date: Wed, 4 Nov 2020 19:16:47 +0100
Subject: [PATCH] Do not add the entity as viewer multiple time

---
 src/main/java/net/minestom/server/entity/Player.java | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/main/java/net/minestom/server/entity/Player.java b/src/main/java/net/minestom/server/entity/Player.java
index 425a01b9c..929a3928e 100644
--- a/src/main/java/net/minestom/server/entity/Player.java
+++ b/src/main/java/net/minestom/server/entity/Player.java
@@ -1500,7 +1500,7 @@ public class Player extends LivingEntity implements CommandSender {
                     entity.addViewer(this);
                 }
 
-                if (entity instanceof Player && entity.isAutoViewable()) {
+                if (entity instanceof Player && entity.isAutoViewable() && !viewers.contains(entity)) {
                     addViewer((Player) entity);
                 }
             });