The word "duplex" is not displayed in printer dialogue

[Springnuts]

Please see attached screenshot. When printing from Libreoffice, entering the printer properties the word "duplex" is shown as blocks of black/white. Oddly, after a few minutes, returning to the window it is displayed correctly.

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: libreoffice-core 1:5.1.2-0ubuntu1
ProcVersionSignature: Ubuntu 4.4.0-21.37-generic 4.4.6
Uname: Linux 4.4.0-21-generic x86_64
ApportVersion: 2.20.1-0ubuntu2
Architecture: amd64
CurrentDesktop: Unity
Date: Tue May 3 09:10:05 2016
ExecutablePath: /usr/lib/libreoffice/program/soffice.bin
InstallationDate: Installed on 2016-02-26 (66 days ago)
InstallationMedia: Ubuntu 15.10 "Wily Werewolf" - Release amd64 (20151021)
SourcePackage: libreoffice
UpgradeStatus: Upgraded to xenial on 2016-04-22 (10 days ago)

[Springnuts (simon-springnuts-orangehome)]

This is weird. Pressing PrtScr causes the word to display properly - hence the photo attached to the bug shows no error! Here is a photo of the screen - apologies for poor quality - which shows the bug.

[Springnuts (simon-springnuts-orangehome)]

I deleted the photo attached to the initial report, as it was confusing.