Why does my ipod disconnect me from the internet at a certain time every night?

Every night at 9 pm my Ipod disconnects me from every app that requires internet. It says I am still connected to the internet but I still can't access my apps. I'm not sure what time it reconnects me in the morning. My Ipod had not been doing this until I got the latest update. I'm not sure if there is anything I can do to change this but if there is I would like to. I have gone through my Ipod and there are no restrictions set that I have noticed.