RSS feeds inconsistent

[Vincent Jurgens]

Are RSS feeds per forum maintained? I changed to new feed URLs, found in Page Sources, and some work, some don’t. For example:

Premier Pro https://creativecow.net/forums/forum/adobe-premiere-pro/feed/ worked

Sony Cameras https://creativecow.net/forums/forum/sonycameras/feed/ did not work, in Netvibes, nor Vienna app

Audio Engineering https://creativecow.net/forums/forum/audioprofessionals/feed/ did not work in Netvibes, but did in Vienna

Adobe Premiere Pro