If I can expand upon duplex printing I have encountered an issue in the control centre 18.10 too. When enabling duplex in gnome-control-center it does not work,
$>lpoptions -l ... Duplex/Two-sided: *None DuplexNoTumble DuplexTumble ...
but when doing so in system-config-printer it does
$>lpoptions -l ... Duplex/Two-sided: None *DuplexNoTumble DuplexTumble ...
If I can expand upon duplex printing I have encountered an issue in the control centre 18.10 too. center it does not work,
When enabling duplex in gnome-control-
$>lpoptions -l
...
Duplex/Two-sided: *None DuplexNoTumble DuplexTumble
...
but when doing so in system- config- printer it does
$>lpoptions -l
...
Duplex/Two-sided: None *DuplexNoTumble DuplexTumble
...