Comment 8 for bug 1719244

I installed a few days ago. The two network icons appeared after the update for update-notifier-common:amd64 (3.192, 3.192.1) for me. At least it was recognized after the reboot. Thankfully at the same time my battery indicator came back because that randomly disappeared in an earlier update.

mate-panel:
  Installed: 1.20.1-3ubuntu1
  Candidate: 1.20.1-3ubuntu1
  Version table:
 *** 1.20.1-3ubuntu1 500
        500 http://us.archive.ubuntu.com/ubuntu bionic/universe amd64 Packages
        100 /var/lib/dpkg/status