hotspots - leading line on preview/publish

Version 5.40.4 - When adding text to a hotspot, during the creation, it looks correct.  Upon preview, a blank line at the top appears. See attachments: 2 previews where line is visible and not, plus the hotspot text editor.

I have tried several different ways to create and have not been able to determine how the extra line is generated.  I have edited one that was correct, and after entry of new text, the line appears.