The modal "Card" popup closes unexpectedly as I'm selecting text I want to cut-and-paste into another card. This happens because of the Modal Popup feature that lets a user close the modal if they click in the gray shaded area outside the modal popup. Modals used to only allow users to close it by clicking the X in the corner or click the OK or Cancel button. To Duplicate press down on the mouse button, drag over the text you want to select for copy, then release the mouse button outside of the modal. I select text quickly and have had to train myself to do it more precisely as there is only a half inch gap between the edge of the textbox and edge of the modal. To fix, I suggest ignoring the mouse up button event and only close the modal on the mouse button down event.