Those apps are misbehaving, instagram's home is like 3mm off downwards, also it lags on videos with audio, and freezes the video (and stories) and you cant see them... like never... Snapchat's Storie feed is unavaliable until you go to search and press SPACE (so it gets an imput and search for basicaly all the stories of the one you follow)
I got the latest OS 4.6.6.1 unlocked version. any helps?