iPad Wifi off when iPad at Sleep Mode

My cellular Air 2 notifies me of mail and other events while on WiFi while sleeping, even with cellular is off. All of my iPads have done the same. So while sleeping, your iPad is still "listening".

 

Same here. My wifi IPA2 alerts me to new email while smart cover is closed.

 

that has happened to me with the iPad 4th gen, but i don't see any data being used while it is asleep

 

That is strange and not the way it is supposed to work. My iPad Air 2 even records each and every text message between me and my customers during the day from my iPhone.

 

Wow, I haven't had that issue at all since iOS 7. I had this issue on iOS 6 and it was quite annoying. I would wake the device to see no wifi symbol at the top left, then it would appear and notifications would just go insane, all arriving at once.

Anyway, I would try rebooting the iPad to see if that will somehow alleviate the issue.

If that doesn't help, try going to Settings>General>Reset>Reset Network Settings.

If neither of those help, try Settings>General>Reset>Reset all Settings.

If you have performed all of these options and the issue still persists, a full restore of the iPad through iTunes may be necessary.