Bill,
Here is a test page with the Lead and Button shortcode. I pulled up the Inspector and it looked like it’s coming from the pre class=”line-pre”. Here is the html below and a pic. If I remove the background color and border from the Pre class, it goes away. Something WP is adding in the shortcode possibly.
[lead]This is a test[/lead]
The text above is a test
[button url="http://creationgraphx.com" label="Test Button"]
I’ve included a before and after pic to show the difference. I also noticed that the text is missing it’s styling. Not sure why.