Core/Transport: do not relocate players on board of vehicles when near teleporting. Vehicle should take care of that

src/server/game/Entities/Transport/Transport.cpp

@@ -621,6 +621,11 @@ bool Transport::TeleportTransport(uint32 newMapid, float x, float y, float z, fl
         {
             if ((*itr)->GetTypeId() == TYPEID_PLAYER)
             {
+                // will be relocated in UpdatePosition of the vehicle
+                if (Unit* veh = (*itr)->ToUnit()->GetVehicleBase())
+                    if (veh->GetTransport() == this)
+                        continue;
+
                 float destX, destY, destZ, destO;
                 (*itr)->m_movementInfo.transport.pos.GetPosition(destX, destY, destZ, destO);
                 TransportBase::CalculatePassengerPosition(destX, destY, destZ, &destO, x, y, z, o);