swagger online ui doesn't see the host property in the spec and disables interactive UI

I have a valid swagger 2.0 json spec file which I import into the online editor. The validation is successful. I have the host property in my json spec but the editor has a warning on the top

Note: The interactive forms are disabled, as no `host` property was found in the specification. Please see: OAI 2.0/#swagger-object

This started happening today, I am guessing the new 3.0 editor was introduced yesterday.