First accordion open by default on page load

Hello,

I am using the Tabby plugin on a site I am developing. I have modified the CSS a bit to make it so that the accordion layout is displaying at all times. The issue I’m experiencing is that the first accordion is open by default when the page loads. Being that I’m using accordions rather than tabs, this is not desirable. I would like all accordions to be closed when a user first comes to the page, unless I am linking to a specific tab from another page.

I have tried to use the ‘open’ parameter in the shortcode, by setting the value to “no”, but this does not seem to do anything.

Can somebody please tell me how I might be able to accomplish keeping the first tabs/accordions from being open when the page loads?

Thank you.