Networking icon in tray, orange underline - what does it mean?

[packzap]

I have Linux Lite installed (altho when I go to System Information, it says the operating system is Ubuntu 20.04.6 :023: ). I've noticed recently that the small networking icon down at the bottom right of the tray bar, shows an orange underline below it.  I am connected to my network with a WiFi connection and browsing the internet seems normal. Clicking the icon and selecting System information shows the correct network information with no errors.

I tried disabling wifi and networking, and re-enabling, and also rebooting the system, but the orange line continues to show under the networking tray icon.  All the latest updates are installed.  What does the orange underline signify?