Sorry for a long delay.
There is a bug in accordion shortcode. We’ll fix it in the next update.
For now you can use the following shortcode to collapse the tabs: https://www.8theme.com/demo/legenda/shortcodes/toggle/
[toggle_block class="bordered"][toggle title="Toggle title 1"]Content1[/toggle][toggle title="Toggle title 2"]Content2[/toggle][toggle title="Toggle title 3"]Content3[/toggle][/toggle_block]
