After my iPod has been turned off for a couple of minutes; it seems to disconnect from the internet. Any reasons?

I've had this iPod touch for a little over a year and never had any major issues until this. As the topic states, my iPod seems to disconnect from the internet after being turned off for a few minutes. A few days ago I was on Instagram while my internet shut off and apparently was automatically set back to factory-like settings. Ever since then my iPod has been acting kinda wacky and I can't find any solution. The alerts and notifications don't show up on my lock screen very consistently and when they don't, I put my passcode in and the alert or notification shows up on my home screen. It does a weird thing when I turn it on; the wifi signal shows that it's at 1-bar of strength, then the signal goes away completely, and once I put my passcode in, the signal reappears as a 3-bar connection. (Which it is). It's a 5th generation running the latest iOS.