Just found out that they moved the WiFi settings when I was looking for when my WiFi was connected during sleep after the Jelly Bean update. Found that setting under "Settings" -> "WiFi" then press settings button on bottom left of phone and go to "Advanced". I found that the setting "Keep WiFi on during sleep" on my phone had reverted to "Always", when my original setting (and the one that I wanted) was "Only when plugged in". So I changed the setting back to "Only when plugged in", which helps with battery life.
Don't know if this helps anyone else, but I was a little suspicious since I hadn't been seeing the "connected to WiFi" messages when I woke up my unplugged phone *smile*.
Don't know if this helps anyone else, but I was a little suspicious since I hadn't been seeing the "connected to WiFi" messages when I woke up my unplugged phone *smile*.