We have issue reported where when we take report printout the data get cutoff at the buttom. Your issue looks similar but here in your case genreated report itself having data cutoff.
If your server is in older version, i would recommand to upgrade to latest code and check the status. If you are already in latest code then open a TAC ticket to get any patch from the engineering team.
As a workaround for now, convert html to pdf.
Regards,
Pavan
If my post address your query, give kudos:)