Favicon replacement issues

I updated my favicon yet the old one persists even after being removed from my site assets

An irritating issue! And one I've seen many times! Favicons tend to be rather sticky, and hang around after you try and change them, never sure why, but a good hard refresh of browser cache after a day or two tends to show up the new one, as does a first-time load on a different browser. Sorry I can't be more helpful!