Taskbar chimera image when using two screens

Since the update to Star Dock 1.56, when I use two screens, I get a chimera image of the taskbar of screen 2 showing at the top left of screen 1.  It is scaled down and about 2/3 the size of the actual taskbar on screen 2.  It sometimes dissapears if I click on screen 1, other times persists and gets in the way.  When I go back to screen 2, it reappears on screen 1.  It clearly should not be there and is an annoying visual distraction.