Device Not Connected To The Internet

[BigCTM]

I have upgraded to 5.1. When the screen goes to sleep, my device disconnects from the internet for some reason. When I turn the screen back on, it has a message stating that the device is not connected to the internet. It is not that big of a deal because it instantly connects to my network every time. I have keep wi-fi on during sleep set to Always. Any other ideas? Thanks.