My WordPress site began returning the a blank page with the text "410" whenever I published a new post. Some digging, and I found it came from a plugin that tried and failed to ping Bing. Removed the plugin and everything started working again. Thanks for the heads-up! I'd never worked out the problem if I had just read about it on your blog.
Comments on Bing stops accepting Sitemap pings, switch to IndexNow instead
Index Now seems like an improvement over the old sitemap ping. There's less overhead on both ends of the transaction. I'm still miffed that I now need to spend time to implement a new API.
IndexNow seems like an improvement, but I don't appreciate the lack of transparency from Bing. They should have given us a heads up and time to transition to IndexNow before turning off sitemap pings.