Do you have a new blog post example that isn’t working? I posted a photo yesterday and it went to Bluesky without any problems, so I don’t think it’s a widespread issue at least.
Do you think it’s possible it’s related to my custom domain and using that as my Bluesky account name? That’s the only thing I can think of that might be atypical about my setup.
This was happening to me for a while. It happened when I was using a category feed to cross post. For example, I had a category called “cross-post” and I used only that category’s feed to cross post to both the Micro.blog feed and mastodon/bluesky.
What fixed it was switching to the .json feed instead of xml. Maybe not your issue, but throwing it out there just in case.
I just fixed this error but the change isn’t live yet. However, it should only happen the first time you set up your feed on the Sources page. After that, should work!