There has been an issue that took a while to track down where petitions wouldn’t display despite there being a shortcode on the page.
Thanks to Tobias author of another plugin. Working with Steve from Florida he noticed a non breaking space being inserted in the example short code in the list of plugins.
Dummy widget petitionRead the petition
Error: You must include a valid id.
Knowing the problem, it was a really simple fix that was worth pushing as an update on its own.