When my MacBook Pro 15" (Mid-2015) resumes from sleep by timeout or by opening the lid I will get a black screen (I can see the background light on the borders, so its not 100% black) and I can only hear a beep if I press a key, there is no way (that I know) to fix it, the only solution is to force a shutdown via pressing the Power button for 5-10 sec, very annoying, happens multiple times a day, any tip on how to fix it or deal with it, will be appreciated, thanks