Hi, This is a duplicate of https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=854149 https://bugs.launchpad.net/ubuntu/+source/fonts-liberation/+bug/299158 https://gitlab.gnome.org/GNOME/vte/-/issues/147
There are multiple fonts that show this behavior, some not just in VTE but in other GTK apps as well. I don't know who the actual culprit is. e.