Default [Q] Picture sliding anomaly

Hi guys, when I browse my pictures through the file browser and open a picture, it let's me to slide and see the next picture and etc. But sometimes without any obvious reason I am unable to slide...When I use the "Gallery" - no problem.But I just prefer the browser...It might be a bug in the rom or something else...
I'm running JB 4.1.2 , not rooted...Help me out...10x