I answered this yesterday in a peer-to-peer topic on this community, but some versions of Chrome seem to prefer the "application icon" defined in the manifest.json file as the favicon for the front end. We are outputting the correct favicon mapping HTML tag, so this is really on the browser and I've not found much documentation that explains why this occurs, or a simple workaround (outside of uploading a literal "favicon.ico" to your website root directory, which isn't feasible especially for Community In The Cloud customers).