Overriding NetworkManager is very difficult to do successfully, and this is likely the cause of the issue. Probably best to just restore it and let it do its thing.

I don't use Redhat/CentOS/Fedora -- personal preference: I find them to be user-hostile, and I gag at their package "management" system. smile But most distros have a checkbox for "Share this connection" or some such thing. Always check it.

Cheers