Audacity 2.3.3 track display area not updating on Linux

[steve]

However it would be nice to work out what the real issue is.

There are some clues:

I am unable to download FFmpeg plugin from manual link which does not work

Can’t see with Firefox/Chrome/Safari. Here’s a screenshot from firefox. Is this something to do with geolocation? I am in London. Have tried from mobile too. Would be great to have this on another domain. [Screenshot 2020-10-23 at 20.03.42.png]

https://bugs.eclipse.org/bugs/show_bug.cgi?id=517671

A Weird GUI Problem With GNOME Programs