
The title is set from extension metadata, which isn't supposed to contain markup. That means it may contain unescaped characters like `&` that break the title when interpreted as markup. Explicitly opt out of markup handling to fix this. Close: https://gitlab.gnome.org/GNOME/gnome-shell/-/issues/7579 Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/3266>