Cloudflare keeps serving old version of non-existent website

Domain I used to own expired so I’ve deleted it from my Cloudflare account. This happened a couple of months ago.

But I’ve just noticed Google re-indexed this old domain (which I don’t even own anymore) with an old version of my landing page. I checked the networking in DevTools and all the assets (and html) are coming from Cloudflare.

This only happened after the domain expired because before I had redirects set up to another (new) domain I’ve migrated to.

It looks like someone bought the domain and didn’t change DNS records so it’s still pointing to Cloudflare and Cloudflare is still serving the old version even though I have manually deleted the domain from my account months ago?

@user11924 Can you send a copy of the response headers?