Saved page on data-load.me doesn't allow to expand and collapse a block

[Tragen]

Describe the bug
On data-load.me, there is an option to expand and collapse spoilers.
When I save the page, SingleFile saves the state how it is but it cannot be changed in the saved page.

To Reproduce
Steps to reproduce the behavior:

1. Go to https://www.data-load.me/threads/neon-genesis-evangelion-death-and-rebirth-1997-german-dl-anime-1080p-web-x264-internal-bigint.264687/
2. Save page
3. Open the saved html in a new tab
4. click on spoiler. nothing happens

Expected behavior
I expect the spoiler to toggle like on the original page.

Environment

• OS: Windows 25H2
• Browser: Firefox
• Version: 146
  Tested with Edge and Chrome also.