If disable-publishing or disable-user-service-publishing is set to 'yes' in /etc/avahi/avahi-daemon.conf, Draw and Impress crash with the error: soffice.bin: client.c:626: avahi_client_free: Assertion `client' failed. Opening a file, opening a component directly from the applications menu or the command line and creating a new Draw or Impress document with LibreOffice already open all produce the error.
Thank you for the bug report. Already triaged and confirmed in bug 81552. Best regards. JBF *** This bug has been marked as a duplicate of bug 81552 ***