I've a solution which is very good !
1 --> Go to "Theme app"
2 --> Go to "Mix"
3 --> Go to "Status bar"
4 --> Search theme named "GrayG. V5"
5 --> Download and apply only status bar theme
Enjoy lag is disappeared ! :)
Chinese users have a bug about FC with Phone. The issue maybe come from "framework-miui-res.apk/res/values/arrays.xml/. Can you view this ?
No problem with other framework-miui-res.apk (For instance : Miui France file).
In particular view in Crespo.
Thank you.