Fix distance map contains (#6530)

patches/server/0430-Use-distance-map-to-optimise-entity-tracker.patch

@@ -6,7 +6,7 @@ Subject: [PATCH] Use distance map to optimise entity tracker
 Use the distance map to find candidate players for tracking.
 
 diff --git a/src/main/java/net/minecraft/server/level/ChunkMap.java b/src/main/java/net/minecraft/server/level/ChunkMap.java
-index 22c691f3bfbfc5f8e7420c14de36a353b31fc123..5f8399cc2ba5114d11298808528b18f044c650ce 100644
+index 22c691f3bfbfc5f8e7420c14de36a353b31fc123..136b832c1a04042457817b2bf2a4a5d057d1b6ca 100644
 --- a/src/main/java/net/minecraft/server/level/ChunkMap.java
 +++ b/src/main/java/net/minecraft/server/level/ChunkMap.java
 @@ -63,6 +63,7 @@ import net.minecraft.network.protocol.game.ClientboundSetEntityLinkPacket;
@@ -271,7 +271,7 @@ index 22c691f3bfbfc5f8e7420c14de36a353b31fc123..5f8399cc2ba5114d11298808528b18f0
 +            // for players that were removed
 +
 +            for (ServerPlayerConnection conn : this.seenBy.toArray(new ServerPlayerConnection[0])) { // avoid CME
-+                if (newTrackerCandidates == null || !newTrackerCandidates.contains(conn)) {
++                if (newTrackerCandidates == null || !newTrackerCandidates.contains(conn.getPlayer())) {
 +                    this.updatePlayer(conn.getPlayer());
 +                }
 +            }