bowlschat Hi
Having tried to replicate, The bug appears to be chrome specific as the favicon is also seen in code reference through page source and reflecting fine with other major browsers - firefox or safari
Surely, We can see with future Chrome update ever since several people have reported similar bug in the specific topic redirection 🙂
Also, You may check if the favicon is reflecting fine with default joomla template assigned whilst changing the favicon in \templates\protostar
on all major browsers