When I am trying to convert a large HTML document with some large fieldsets into a PDF document, then every time it finds a fieldset, if it doesn't fit in the current page, it is starting it in the new page and if the fieldset size is more than the page, extra content is disappearing.

Hello,
Please send us the link/html document if possible, the exact doPDF version and build and the Windows OS version you are using to [email protected] for troubleshooting purposes.
Thank you.