Even with selecting portrait and appearing as portrait a document prints sideways and incompletely on my Epson WF 2540. I have no problems printing in Pages and did not have problems in previous version of Libre Office. I updated Libre office when I updated my Mac OS system to the latest version. I have used Libre Office for PC and MAC for years as it makes easy transfers of document from my PC to my MAC and vice versa via Dropbox. I also use spreadsheet and presentation regularly. I have done mailing labels from spreadsheet via database regularly for years. It's so easy.
Print any portrait document in Writer
It printed it partially sideways as if attempting landscape but with portrait margins.
User Profile Reset: No
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:59.0) Gecko/20100101 Firefox/59.0
This should be fixed, please try with versions 5.4.6 or 6.0.4.
*** This bug has been marked as a duplicate of bug 92190 ***