Core/Movement: Fixed near teleports, big thanks to @Trista who basically figured this out on his own.

src/server/game/Entities/Player/Player.cpp

@@ -2067,15 +2067,6 @@ uint8 Player::GetChatTag() const
     return tag;
 }
 
-void Player::SendTeleportPacket(Position &oldPos)
-{
-    WorldPacket data2(MSG_MOVE_TELEPORT, 38);
-    data2.append(GetPackGUID());
-    BuildMovementPacket(&data2);
-    Relocate(&oldPos);
-    SendMessageToSet(&data2, false);
-}
-
 void Player::SendTeleportAckPacket()
 {
     WorldPacket data(MSG_MOVE_TELEPORT_ACK, 41);

src/server/game/Entities/Player/Player.h

@@ -1947,7 +1947,6 @@ class Player : public Unit, public GridObject<Player>
         void SendMessageToSetInRange(WorldPacket* data, float dist, bool self, bool own_team_only);
         void SendMessageToSet(WorldPacket* data, Player const* skipped_rcvr);
 
-        void SendTeleportPacket(Position &oldPos);
         void SendTeleportAckPacket();
 
         Corpse* GetCorpse() const;

src/server/game/Entities/Unit/Unit.cpp

@@ -17325,10 +17325,23 @@ void Unit::NearTeleportTo(float x, float y, float z, float orientation, bool cas
     else
     {
         UpdatePosition(x, y, z, orientation, true);
-        SendMovementFlagUpdate();
+        Position pos; // dummy, not used for creatures.
+        SendTeleportPacket(pos);
     }
 }
 
+void Unit::SendTeleportPacket(Position& oldPos)
+{
+    WorldPacket data2(MSG_MOVE_TELEPORT, 38);
+    data2.append(GetPackGUID());
+    BuildMovementPacket(&data2);
+    
+    if (GetTypeId() == TYPEID_PLAYER)
+        Relocate(&oldPos);
+        
+    SendMessageToSet(&data2, false);
+}
+
 bool Unit::UpdatePosition(float x, float y, float z, float orientation, bool teleport)
 {
     // prevent crash when a bad coord is sent by the client

src/server/game/Entities/Unit/Unit.h

@@ -1592,6 +1592,7 @@ class Unit : public WorldObject
         void SendSpellDamageImmune(Unit* target, uint32 spellId);
 
         void NearTeleportTo(float x, float y, float z, float orientation, bool casting = false);
+        void SendTeleportPacket(Position& oldPos);
         virtual bool UpdatePosition(float x, float y, float z, float ang, bool teleport = false);
         // returns true if unit's position really changed
         bool UpdatePosition(const Position &pos, bool teleport = false) { return UpdatePosition(pos.GetPositionX(), pos.GetPositionY(), pos.GetPositionZ(), pos.GetOrientation(), teleport); }