Popup Sends BricsCad to Icon Bar

BricsCad 11.3.16 on Ubuntu 12.04

Whenever I select a draw command such as line and click on a node I get a large blank popup box that immediately disappears. If the view is zoomed in a lot and the popup is on the left side of the screen, Bricscad immediately shrinks to the Ubuntu icon bar as a minimized window. I click on the Bricscad icon and it come back.

Do you know what popup this is?
Do you know how to completely disable the popup?

Thanks for your help.

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