Hi Cilikridho,
Have you tried connecting to other ISP and retry? Maybe the problem lies with your ISP, try clearing cache and restart. Try turning on/off speed mode and do a ping test. Hope this helps. Happy gaming!
It is I can ensure you, but what is surprising to me that it is not happening only because of Helcurt. I had a game where there was no Helcurt, only a Natalia and the lag came again.