Preserve interaction with back button - Accordion state

I have an accordion that show/hides some checkboxes used for some filters. If a user checks on a checkbox, then clicks on some content resulting in them navigating to the associated page they can use the back button to return to the original page again. When this happens the state of the checkboxes and filtering is preserved but the accordions are returned to their default, closed state. Does anyone know how I can preserve the state of the accordions so that they remain the same if the back button is used?

Here is my public share link: Webflow - Inspired Instruction

Page here: Professional Development Plans and Template | Inspired Instruction

I have the same problem actually - no solution yet. Help would be much appreciated @PixelGeek
@Finsweet maybe? :full_moon_with_face: