It's fixed in 5.17 and this is the release number I see on the Google playstore.

Unfortunately for my ubuntu 18.04 LTS and this is in no way Signal's fault (but maybe the desktop version doesn't have that bug ?):

    $ apt-cache policy signal-desktop
    signal-desktop:
      Installé : 5.10.0
      Candidat : 5.10.0
     Table de version :
     *** 5.10.0 500
            500 https://updates.signal.org/desktop/apt xenial/main amd64 Packages
            100 /var/lib/dpkg/status
         5.9.0 500
            500 https://updates.signal.org/desktop/apt xenial/main amd64 Packages
         5.8.0 500
            500 https://updates.signal.org/desktop/apt xenial/main amd64 Packages

It was closed 4 minutes ago; when was it fixed? ETA: Ah, 4 days ago (more than half a year after it was opened).