Text being entered in the text tool (not committed to the canvas via [Enter] or [Tab] keys) disappears after dialogs appear and are dismissed.
Example: Select "Text" tool, click the canvas, type some characters, click the right mouse button repeatedly. The "use the left mouse button" dialog appears. Click OK to dismiss it. The text being entered with the "Text" tool is not visible until typing more, clicking to move it, or hitting [Enter] or [Tab] to commit it.