UB Multisite Favicons not working on sub-sites

Hello,

Using UB and can't get Custom Multisite Favicons to work on sub-sites.

Have Checked: Allow favicon defined here to override the site icon defined in Appearance > Customization

And Checked: Use this as default favicon for all sub-sites

It is working on main site front and back end.

The ico image shows in Main site Favicon and Sub-site favicons.

I even manually put a link through the browse button for the sub-site but it didn't make any difference.

Tried a bunch of different browsers - not a browser problem.

Any help would be appreciated.

Thanks