Small transparent window on top left of screen after unlocking.

As you can see from the image I have attached there is a small bar/window that is mostly transparent covering the start button and a few icons.  This happens every time I unlock my machine with objectdock running and my taskbar on the side of the screen with the dock across the bottom.

I have seen this happen with 2 different machines one running windows 7 and the other windows 10.  I'd like to find out if this is a setting I'm using or a known bug.