Smart Assertions - Metadata and case sensitive header names

Smart Assertions - Metadata and case sensitive header names

I've recently have found out that smart assertions seems to be case sensitive to header name. For example there are two web-servers. Both of them sends the same response header but one sends it like 'Access-Control-Allow-Origin' and another like 'access-control-allow-origin'. Such difference brings different results: for one web-server it passes successfully, and for the other it fails. 

Is there any thoughts or existing request about adding an option for header name case sensitivity (like for values) in "Smart Assertion"?