I’m using Insync 1.4.5 behind a Authenticated HTTP Proxy on Ubuntu 17.10.
My problem is with System tray icon. While using the application with proxy, the icon is generally greyed out (Like it is not connected). The icon flashes once in a while(show syncing or connected icon).
This problem doesn’t happen when using direct connection. Also this problem started when I upgraded to latest version of application recently.