Hey everybody! Sorry for all the trouble. I’m going to forward this thread to the others on the Bing team. Bing is not supposed to index the RSS with noindex meta tag, so this is likely a bug or crawling issue. Thanks for the report!
Expect this to be fixed only within a few hours. I will then get back to this thread and make a post confirming so. If we experience some issues, I’ll take this to a private message with the OP. Again, thank you all.