This is a known issue previously reported in Report an Issue:
For More Information see: lost line when text field is break across pages in particular condition
This is one of many acknowledged bugs that can be found in the Known Bug List thread here in the Report an Issue section of the forum.
It can also be downloaded as a database file from: https://www.dropbox.com/s/jt09b82i0xijbu3/FMP%20Bugs.zip
I understand the bug is known over several FMP versions/years and still is present!
Im my case regulation/law records get missing! It would be really nice if the data of FMP can also be given out in a report. Support for new formats like iPhone/iPad are great, but a really big plus would be to focus also on the output paper/PDF. I remember I struggled alreday at FM7 with such issues.
Still loving FMP.
I am just a fellow user. I don't work for FileMaker Inc. and thus have no influence on what priority is set for the correction of any one specific bug. You are welcome to post your comments to the original thread if you wish to bring this to the attention of a TS person that works for FileMaker or you can post your comments to Feedback.
Comments in this part of the forum are less likely to be seen by FileMaker personnel as post people are helped here by fellow users of the product.