I use the Hubspot for WordPress shortcodes for my Hubspot forms. I have 6 in use at the moment. I went to edit some of the shortcodes but the admin page had an empty [hs_form id="0"] field so the rest didn't show up. After digging through, somehow that [hs_form id="0"] was cleared but the rest still had their proper code.
I assume that since the plugin saw the first shortcode was empty, it didn't show the rest. Don't know if this fixable but just wanted to report the bug. I'm still unsure how that first shortcode got cleared.