Screen Lag issue

Help
#1

Hi admin, why when there is many player in war then will super lag?
But, when i off the player name then is smooth. what is the problems btw??
Pls advice

#2

@LionHeart
Can you send us a video of this issue? Is there an actual FPS drop?

#3

video files too big unable to send. when On name war FPS drop till 20-30 , while Off name war FPS raise 80-100