Thank you for your post.
I am unable to replicate the issue. See my sample screen shot below of FileMaker Pro 13.0v4 Advanced under Windows 7.
Are you logged into the file with full access permissions? If not, you may not have access to the Container field on the layout. Also, check the Inspector -> Position -> Sliding & Visibility -> Object visibility, and make sure "Hide when printing" is unchecked.
Keep me updated with any progress.
Might the container field be located in a different layout part or cross the part boundary between header and body?
If so, make sure that the container field is fully inside the body layout part.