On YouTube you have to reload the page in order to get an accurate RSS link for the channel you're currently browsing (unless you went directly to the channel page from a Search Engine or something), but otherwise this is probably the best RSS Feed extension to use on mobile.

It's a bug I've also experienced with other extensions of this kind, but where this extension excels is in it's mobile friendly UI and presentation.

I'm not sure what would fix the bug, maybe it would be as simple as a "refresh" button in the extension pop-up. Nevertheless, this is probably the best extension of it's kind for mobile by technicality.

Pra ficar 5 estrelas só falta ela ter o seguinte comportamento, quando o site não possuir RSS então o ícone deve ficar preto e branco.