Interesting Screen Glitch

Here is an interesting issue with my MacBook Pro.  I tried searching for a particular app in LaunchPad and when I selected a different app, the application icon of the original app I had searched for remained on my screen (and still is on my screen actually).  Any ideas regarding the cause of this issue?  Here is a screenshot:


MacBook Pro (15-inch, Late 2016), macOS Sierra (10.12.1), null

howapple - hello


What happens if you just restart the computer?