Debian sid/unstable with *libreoffice* 4:24.2.3~rc1-3, and *gnome-shell* 44.9-1+b1. $ libreoffice --version LibreOffice 24.2.3.1 420(Build:1) Editing a DOCX document, and recording the changes, typing *begrüßt* the ß was not recognized, so *begrüt* is there. After that, I wasn’t even able to enter other umlauts like ü. Copy and pasting these characters works.