Actually fix lay for PosePlugin

connector/src/main/java/org/geysermc/connector/entity/PlayerEntity.java

@@ -77,12 +77,19 @@ public class PlayerEntity extends LivingEntity {
      * Saves the parrot currently on the player's right shoulder; otherwise null
      */
     private ParrotEntity rightParrot;
+    /**
+     * UUID to use instead when spawning the player
+     * Bedrock expects uuids to be actually unique for each player entity
+     * Spawning another player entity with the same uuid will replace the old entity
+     */
+    private UUID spawningUUID;
 
     public PlayerEntity(GameProfile gameProfile, long entityId, long geyserId, Vector3f position, Vector3f motion, Vector3f rotation) {
         super(entityId, geyserId, EntityType.PLAYER, position, motion, rotation);
 
         profile = gameProfile;
         uuid = gameProfile.getId();
+        spawningUUID = uuid;
         username = gameProfile.getName();
         effectCache = new EntityEffectCache();
         if (geyserId == 1) valid = true;
@@ -93,7 +100,7 @@ public class PlayerEntity extends LivingEntity {
         if (geyserId == 1) return;
 
         AddPlayerPacket addPlayerPacket = new AddPlayerPacket();
-        addPlayerPacket.setUuid(uuid);
+        addPlayerPacket.setUuid(spawningUUID);
         addPlayerPacket.setUsername(username);
         addPlayerPacket.setRuntimeEntityId(geyserId);
         addPlayerPacket.setUniqueEntityId(geyserId);

connector/src/main/java/org/geysermc/connector/network/translators/java/entity/spawn/JavaSpawnPlayerTranslator.java

@@ -35,6 +35,8 @@ import org.geysermc.connector.network.translators.Translator;
 import org.geysermc.connector.utils.LanguageUtils;
 import org.geysermc.connector.utils.SkinUtils;
 
+import java.util.UUID;
+
 @Translator(packet = ServerSpawnPlayerPacket.class)
 public class JavaSpawnPlayerTranslator extends PacketTranslator<ServerSpawnPlayerPacket> {
 
@@ -53,10 +55,17 @@ public class JavaSpawnPlayerTranslator extends PacketTranslator<ServerSpawnPlaye
                 GeyserConnector.getInstance().getLogger().error(LanguageUtils.getLocaleStringLog("geyser.entity.player.failed_list", packet.getUuid()));
                 return;
             }
-
-            entity.setEntityId(packet.getEntityId());
-            entity.setPosition(position);
-            entity.setRotation(rotation);
+            if (!entity.isValid() || entity.getEntityId() == -1) {
+                // The player entity in the list isn't currently in use, so reuse it
+                entity.setEntityId(packet.getEntityId());
+                entity.setPosition(position);
+                entity.setRotation(rotation);
+            } else {
+                // Create a new duplicate of the player
+                entity = new PlayerEntity(entity.getProfile(), packet.getEntityId(), session.getEntityCache().getNextEntityId().incrementAndGet(), position, Vector3f.ZERO, rotation);
+                entity.setPlayerList(false);
+                entity.setSpawningUUID(UUID.randomUUID());
+            }
         }
         session.getEntityCache().cacheEntity(entity);
 

connector/src/main/java/org/geysermc/connector/utils/SkinUtils.java

@@ -170,7 +170,7 @@ public class SkinUtils {
                         if (session.getUpstream().isInitialized()) {
                             PlayerListPacket.Entry updatedEntry = buildEntryManually(
                                     session,
-                                    entity.getUuid(),
+                                    entity.getSpawningUUID(), // Apply the skin to the uuid used to spawn the player
                                     entity.getUsername(),
                                     entity.getGeyserId(),
                                     skin.getTextureUrl(),