Hey guys, Recently, as in over the past couple of days, my MacBook Pro (Retina, 13-inch, Late 2013) has developed a weird behaviour when unlocking and I'm worried that it is the start of something bad. I managed to capture a picture of it, this displays for around a second, sometimes less, before showing the unlock screen. Any idea what might be causing this? For information, I just upgraded to High Sierra, too. Although I doubt that could be the cause of this. Thanks.