Comment 61 for bug 2034986

I see the bug is addressed, but for what it's worth, one more data point.

I just run into the issue today when doing

  apt remove fonts-ubuntu*

What I didn't notice was that a replacement instead of a removal was carried out

  fonts-ubuntu (0.83-6ubuntu1 => 0.869-0ubuntu1)

After a while I turned back to Firefox — which I had set up to use Ubuntu font as default — and it had corrupted font.

That was not during installation, it was my normal several months old Mantic environment. Restarting Firefox solved the problem. I can reproduce it with

  apt install fonts-ubuntu fonts-ubuntu-classic-