I find the Facebook app to be wiggy/unpredictable and annoying in its anemic look and features.
Not a very positive review, I guess.
I am not making a recommendation, but I will tell you and anybody else that brings up these issues with that and a few other social networking widgets, that the S4 and Note and Note 2, etc browse and function great on those websites and no special app is needed unless the user is very much into being updated/synced all the time.
I use Boat browser.. others swear by Dolphin or this or that.. but the apps/widgets for Twitter and Facebook? Nah... maybe if I still had my Eris.
Meanwhile, you may want to try a data and cache clearing of the Facebook app, reboot and see if that helps for a while. Perhaps even an uninstall then reinstall of the app.