Facebook iPad app always has "break lines" in Newsfeed.

I always get two sawtoothed lines breaking up my Newsfeed. I try to 'Refresh' over and over but the lines remain {and between the lines are all the day's new posts.}. Every once and a while, after attempting to Refresh over and over, Newsfeed will finally load all the new posts, but not regularly, and therefore I am missing all the new posts. Why does this line appear and how do I get the App to load ALL new posts?? {I've deleted and re-installed the Facebook app and this still keeps happening.}