Samsung Galaxy s5 G900A

(Samsung Galaxy s5 G900A) so it started today, when this "glitch?" occurs, I am unable to scroll down. I go to any community but I cannot scroll. I'm stuck at the top, even if I go to other options, like about, or leaders, I'm still stuck. It may just be me, but I've made this post, to keep you "posted," on whether it persists.