Since this is a continuous problem (at least for me) and I couldn't find a topic already dedicated to it, I decided to create a new one. Title says pretty much everything, but let me get a bit more into detail.
Most people will know that there is a spoiler function you can use to hide text when you post a new reply. But it doesn't seem to work. These are the spoiler tags the forum function uses:
[ SPOILER="text"][/spoiler]
Everytime I try to use the funtion, and click on either preview post or submit post, it simply vanishes completely, meaning the spoiler tags and the text I tried to hide.
I've also tried other tags, like [spoiler]text[/spoiler] and <spoiler>text</spoiler>, but nothing seems to work. So the big question is...