I've just had the below back from PaperCut
https://www.papercut.com/kb/Main/KnownIssues/
PC-15736
A hotfix is available as of this morning for this issue,
here are the download links for this: - NOTE PAPERCUT MF ONLY - NOT PAPERCUT NG
https://storage.googleapis.com/papercut-promoted-builds/hotfix/papercut-mf/19/19.0.2-PC-15736.49316/setup/pcmf-setup-19.0.2-PC-15736.49316-linux-x64.sh
https://storage.googleapis.com/papercut-promoted-builds/hotfix/papercut-mf/19/19.0.2-PC-15736.49316/setup/pcmf-setup-19.0.2-PC-15736.49316-mac.dmg
https://storage.googleapis.com/papercut-promoted-builds/hotfix/papercut-mf/19/19.0.2-PC-15736.49316/setup/pcmf-setup-19.0.2-PC-15736.49316.exe