Hello Jeff,
I was able to recreate your issue immediately. If you could please submit your system specs (which you can obtain at <a href="http://supportdetails.com/" rel="nofollow">http://supportdetails.com/</a>) I can pass this along to the developers, as removing the cards seems like an unintended consequence.
Additionally, I've learned if you right click on the tabletop after clearing your drawings and hit "undo" the cards will reappear on the table, but your drawings will not. This should allow you to continue to use your recall method until the bug is removed.