Note that, rather confusingly, GNOME_SESSION_SAVE only controls whether the session is *restored*, not whether it is *saved*. To ensure that it is saved, you must set org/gnome/gnome-session/auto-save-session in dconf, e.g. with dconf-editor.
Note that, rather confusingly, GNOME_SESSION_SAVE only controls whether the session is *restored*, not whether it is *saved*. To ensure that it is saved, you must set org/gnome/ gnome-session/ auto-save- session in dconf, e.g. with dconf-editor.