[AC Question]

I just bought this mi4i three days ago , and i found out something fishy, i tried using Video on Camera app on slow motion , the camera somewhat goes black , i updated the miui to newer version , and the slow motion camera works , and the camera goes on 59.9 fps at the default app . But when it is on snapchat or instagram , both of it have those laggy fps drop , like about 40 fps , so laggy , anybody knows how to fix this?