Hi there,
favicon.ico
is requested by the browser I think. You can upload your favicon.ico
file to your root directory so it at least loads the icon.
Otherwise, you can upload a site icon in Customize > Site Identity, which should prevent the favicon.ico request.
A for the w-logo-blue.png – that almost looks like the WordPress logo on the login page. I’m not seeing it referenced on that page at all (not even in any of the resources). Very weird.. Does it happen if you have no other plugins activated?