Is your channel published or unpublished?
Mine is unpublished. I can refresh the feed status manually, and I can see the changes in the Preview pane on the dev site, but the channel doesn't update. I'm using SON, too. So, this tells me the hangup is between the roku servers and my roku unit....which is why I presume Roku says to allow for 24 hours.
Also, FWIW, Roku 3, SW Version 8.0.0 Build 4143
Update: It's updating now.