Disconnect from WiFi after locking screen

[buiducthang]

Hi everyone,
I'm using nexus 7 2013 and have to deal with a problem like this: after locking screen and turn it on back, I can not access the internet. And after that, I have to refress the WiFi connection to access the internet. Can anyone give me a solution? Thanks very much.

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[patruns]

settings/wi-fi/settings (3 dots at bottom)/advanced - Make sure "Keep Wi-Fi on during sleep is set to always.

 

[buiducthang]

I have done follow your guide but seem it is not affected. I wonder if the problem of KitKat?

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[patruns]

I have Kit Kat on 3 devices including the Nexus 7 and do not have this issue.