Read page problem on mobile

This happens on browsers on mobile that is not Chrome. The red fakku bar on read doujin page goes down when i scroll down.

Phone resolution: 480x800
Phone OS: Android 4.2.2
Browsers: CM, Baidu, UC mini

Screenshots:


If you are wondering why im not using Chrome, coz that browser is laggy on my phone....

Imma delete this post if this only affects me.

:)