I have same problem: when I sleep my mac (macbook pro 15 late 2013 i7 2.3GHz), I can not wake it up without branching my charger, after log in, I use normally without branching. And now, I can see nothing in my status bar except menu : file, edit, view, Apple logo in the left, etc. (clock, date, icons in the top right, etc. disappear).