1. If they are pirated I gave you an answer
2. If not, try playing in High and not Ultra or even lower and see if it happens again
3. If nothing from above helps, search on google your issue : the place of game you lag and see if that happens to other users and not only you, if the company is going to release a patch to fix the issue you are experiencing.
2. and 3. are mostly if your games are authentic. As I told you, pirated games often experience problems such as lagging in certain places and etc.