Precision 7220 IOGEAR dock issue

Dock is working fine, but when I unplug the USBC cable and plug it into another computer , then come back to the 7220 it will not recognize the dock.  K/B, monitors, mouse do not work.  I need to reboot and then everything is back to normal.  I have checked ALL the power settings none are set to turn off the device.  I have updated driver for the dock, and applied all windows updates.