Yeah I use Boost and have the same problem. When I posted my first solution here a couple of days ago I checked that the spoiler worked from the website and it did, so I used the tag the same way here. Your spoiler tag did not work for me on Boost, but both yours and mine work from the website.
I use Boost and for some reason the spoiler tags aren’t displaying correctly. All I see are your words.
Screenshot in spoiler tags that hopefully work for others:
spoiler
Yeah I use Boost and have the same problem. When I posted my first solution here a couple of days ago I checked that the spoiler worked from the website and it did, so I used the tag the same way here. Your spoiler tag did not work for me on Boost, but both yours and mine work from the website.