Winphone 8.1 Lag

[Peyman Tahghighi]

i updated my lumia 520 to windows phone 8.1 and also unlocked it,and now every time i hit start button it load start menu tiles with lag!
anyone else have same problem?
what's the problem?

 

[Lance_WPCentral]

Facing this issue after installing WP8.1 Update 1

http://forums.windowscentral.com/update-1-windows-phone-8-1-gdr1/302363-facing-lag-when-returning-start-screen-wp8-1-gdr1.html