Why does my Nokia Lumia 1520, Windows 8.1 takes a long time to wake up?

[Windows Central Question]

Ever since I installed windows 8.1 Cyan update on my Lumia 1520,this issue of taking a long time to wake up from sleep has cropped up. When the screen goes to sleep and I press the power on button or double tap the screen to wake up, i get this message.." resuming..."" after a substantial gap of few seconds the lock screen gets displayed. This is quite irrititating and kills the very purpose of a high speed processor. This problem did not exist in the windows 8 version.
I have tried soft and hard reset both, put off the wifi, changed screens, uninstalled heavy apps etc.etc.....nothing works... help please

 

[Ed Boland]

Do you have the Live Lock Screen beta installed? That or any other lock screen app?

If so, there's a known issue with that, and a trick to fixing the "resuming" problem. First uninstall the Live Lock Screen app (or any other lock screen app), then enable Kids Corner just for a second and turn it off again. Should clear up the "Resuming..."

Other suggestions are the Cortana live tile. Remove it from your Start screen. (though I haven't had any issues with the Cortana tile myself.)