Spoiler fails to hide stuff in it when supposed to be retracted

[Red :)]

Browser, version and OS: 

Win10, Chrome 88.0.4324.190

Steps to reproduce/what were you doing before it happened?

I clicked on the link to the thread and I saw the issue.

 

What happened?

The text that was in the spoiler was shown by default.

 

What did you expect to happen?

I expected the text to be hidden when I didn't specifically ask for it to be revealed.

 

Link to a page where it happened, if applicable: 

Screenshots of the issue, if applicable: 

I had to take a full page screenshot so it's really long so I put it in a spoiler, hopefully it works this time.

Spoiler

 

Any other relevant details:

Failed to replicate in any other thread.

 

If it's a cloudflare error, what was the ray ID from the bottom of the error page?

N/A

[colonel_mortis]

That topic is super ancient. When we updated to this version of the forum software in 2016, spoilers in some posts were broken like that. The only way to fix those posts is to manually edit them to replace the broken spoiler with a proper one, but it doesn't affect any posts submitted in the past 5 years.