Hi Nikko!
sorry, but I explained evil! :)

This happens when I try to open a PDF in a new tab: go to https://sg-induction.com/prodotti/easyheat/ and try to open, for instance, the “EASYHEAT 1.2-2.4” link (Scarica il PDF).
You’ll see that the new tab has the WP favicon.

Let me know, please!

Thanks,
Giorgio