So I believe what happened is they updated their forum software and it changed the RSS feed.. It's not technically broken, it just doesn't display posts that are tagged as Announcements. Which is why you see some posts but not others.
My bot is custom so I was able to work around it. Instead of using the rss feed you can change the extension to json and get json for the posts. I suspect if you're not using a custom script, this may not help a ton. I think most people are using something like zapier which might be harder to work with json. Also, the json keys are split between announcements posts and regular posts, so you have to check both places, or you are relying on CG to always tag their posts the same way, which I doubt will happen (at least not consistently).