Your Launcher has nothing to do with a system update. It's just the way the system is presented to you. You will get the lollipop update regardless of your launcher.
Posted via the Android Central App
Also use a high quality usb cable not the one that came with it...doesnt provide enough current.... use a nice blackberry charger 2 for $5 on ebay and power it with that....will turn it into hyper mode qi charging!
weird mine has been also lately..never did before....I too thought it was the phone getting old...maybe theres a software problem effecting all of us...my use pattern didnt change either.