BingBot is being blocked by Cloudflare

It was the first thing I did. I found more recent ones like:

Bingbot is blocked by cloudflare - Security - Cloudflare Community

Bingbot blocked with Error 4xx - Security - Cloudflare Community

(which you have responded to as well it looks like) but never seemed to find out what is causing the problem.

I did look at the Overview of the Firewall Events activity log and it says “No firewall events found matching your filters”. THis was over the last 24 hours which covers the time when I was doing URL inspections of my site in Bing Webmaster Tools and it was reporting Fetch errors (until at least I paused Cloudflare).