Cleaning Up Stitch Out ... Please Wait

Hi,

I created a 6" x 12" block design in Art & Stitch.  It stitches out beautifully but at the end I get a message on the screen "Cleaning Up Stitch Out ... Please Wait" then Pro-Stitcher Premium, version 18.11.0461, ungracefully quits.  The motors are still engaged, the tablet reverts to the green Handi Quilter logo screen with the "Pause" button in the lower left and the "Stop" button on the lower right.  Tapping the "Pause" button has no effect, I have not tried tapping "Stop". I have to double tap the Pro-Stitcher logo on the left side of the screen to restart Pro-Stitcher and tie-off the design.  I've designed other blocks in Art & Stitch and not had this happen.  What's going on?  It's time consuming to have to re-start after every block.

Joanne