After the webpage is saved, "Click to show hidden content" cannot be expanded or hidden again.

[jilinge2]

After the webpage is saved, "Click to show hidden content" cannot be expanded or hidden again.

[gildas-lormeau]

That is due to the fact that JavaScript content is removed from the page, see here for more info: https://github.com/gildas-lormeau/SingleFile/blob/master/faq.md#why-dont-interactive-elements-like-folding-titles-dynamic-maps-or-carousels-work-properly-in-saved-pages.