Cannot edit title of the question if the body is defective [duplicate]

Question

I tried editing the title of nginx rewite for new links structure, but was precluded by doing so.

The following was the error message:

× Body cannot contain "http://www.domain.com".

Please use example.com (or .org or .net) for fake URLs. More info

http://meta.stackexchange.com/questions/208963/why-are-certain-example-urls-like-http-site-com-and-http-mysite-com-blocke

This seems like a wrong kind of UX -- if you didn't add any invalid domains, and didn't even touch question body, why should you be precluded from fixing the title?

(In the above question, the change may be trivial, but I don't want to assume the responsibility for editing a body of a really poorly-written question, as that's a sure rabbit hole.)

Answer 1

From Shog9's answer,

This doesn't remove existing examples from the site, but will require that they be changed if the post is edited - and will block all new instances from being added. Folks trying to edit any post containing these will now see:

So it's not a bug. It's intended to be like so. You have to remove invalid links whenever you attempt to edit a post, even if you're leaving body intact.