Ah ok, sorry I missed this one. I think it depends how a ban is processed in the vcl. If the PURGE_HEADER_HOST is omitted it should be detected then in the vcl. It is solved now slightly different with the same result. Using the default if $host is null, and the PURGE_HEADER_HOST is set to ``.*`` (to match all in the vcl) if an empty array is provided.