ECH test site crypto.cloudflare.com is not ECH-enabled

What is the name of the domain?

What is the error number?

None

What is the error message?

None

What is the issue you’re encountering

We use https://crypto.cloudflare.com/cdn-cgi/trace to test ECH in browsers. Now it always returns sni=plaintext

What steps have you taken to resolve the issue?

Checked Query: crypto.cloudflare.com - Google Public DNS
ECHConfig is missing, while it is used to be there.
Tried 8.8.8.8 and 1.1.1.1 recursive resolvers.

Was the site working with SSL prior to adding it to Cloudflare?

Yes

What is the current SSL/TLS setting?

Full (strict)

What are the steps to reproduce the issue?

Go to https://crypto.cloudflare.com/cdn-cgi/trace
It shows sni=plaintext instead of sni=encrypted