("Play","Skins","Options") buttons appear in yellow text when press them

if you press any button in "Home GUI" (Play,Skins,Options) and back again to Home GUI , The buttons (Play,Skins,Options) will change to yellow text (Also the exact button will be lighter than the other buttons).
NOTE: if you touch the background evreything back normal.

samsung galaxy s4
5.0.1 (Lollipop)