Anonomyous Authentication on an Extended Webapplication

I have a 2013 WebApp that is using NTLM, I extnded it and made the extended application anonomyous.

All of that worked fine, within the site collection I made it accessible by anonomyous and it works fine.

I have

site.company.com    NTLM

anon.company.com  Anonomyous

Then I add a host header to the anonmyous webapp

headeranon.company.com

I am unable to make the extendended webapp anonomyous when I add a host header

I dont see the Anonomyous Option under site permissons, but I see it under the extneded site URL

NOTE: Just when accessing but the host header addition I have issues, it still works fine with the original URL created when

I extended the site