In this site:
https://help-service-parts.fireflysemantics.com/
The Favicon renders as the Angular icon. If I go into developer tools and right click on the favicon link, and select "Open in new tab", it opens this:
https://help-service-parts.fireflysemantics.com/favicon.ico
And that shows the right icon. Any ideas on why it's not showing the right icon in the tab?
It is probably a cache, you can see here that it displayed when I clicked the first URL
You can try with a different browser or incognito mode to avoid cache