Z, the problem only happens when the entire paragraph is surrounded by quotation marks, not just the start or end. I assume this is what’s happening to them, as they’re writing large paragraphs without line breaks, whereas you had a few line-breaks in between the quotation marks in your test thing. Whenever I surrounded a paragraph with quotation marks, everything else in the post disappeared except for whatever was within the quotation marks, so I assume this is what’s happening with the people in the Forum Games forum.
The problem is that textile is a really touchy thing to work with, and that’s where this problem stems from. Surrounding something with quotation marks seems to be like a textile thing now (like how surrounding with asterisks makes something bold). Therefore, there are a few workarounds.
=="Hello world"== and <notextile>"Hello world"</notextile>
Become: "Hello world" and "Hello world" respectively. So there are some rather simple workarounds which do not require any extra effort other than a few little characters.
So there, finally got to the bottom of this issue.
Oh, and if you’re skeptical that it allows for them to be put on a new line, all by themselves, without buggering everything up: