ok so why is it when i press my back button while in an app, it takes me to my home screen instead of the previous app i was in... ? for example: say if i am in the vine app and i get a text, i select the text from my notification bar and reply (of course). now, when i am done replying and i hit the back button, it takes me to my home screen. i have to go and reopen the vine app and it starts at the top of my feed, even if i was not looking at me feed when i initially got the text. this happens with every app when i get a text whether its vine, browser, twitter, anything... is this normal?