Formatting is removed on a frontpage post preview

Hi

This is something I have no idea how to fix or if is normal behaviour (I hope not).

I have created a demo post a poem that is on a few lines <p></p> and in the article view it looks normal. When you look at it on the frontpage view it has had its formatting removed so it is just a block of text.

How can I get a normal preview so the HTML/formatting is maintained?

Thanks for all the help