This one might stupid, but just in case: Are you absolutely sure that it's gnome-terminal, and some other similar app (xfce-terminal, mate-terminal...)? What's the output of echo $VTE_VERSION ?
This one might stupid, but just in case: Are you absolutely sure that it's gnome-terminal, and some other similar app (xfce-terminal, mate-terminal...)? What's the output of echo $VTE_VERSION ?