How to keep request header during redirect scenario?

Hey 白夜有点黑 

I don't think I'll be much help on this - but firstly is this a custom header?  in the details below - you represent the header and value as 'Purpose: Prefetch' - but I know there is already a 'Prefetch' http header - but there isn't a standard one known as 'Purpose' - can  you clarify what you mean by 'Purpose: Prefetch'?

You haven't supplied a list of the other headers in your requests - the values of some of the other headers 'could' be impacting other headers - especially custom ones - could you list out all the headers for both the fiddler and soapui requests - perhaps a screenshot?

nmrao responded to a similar issue several years ago where he manually added a custom User-Agent header in the request (without setting the "User-Agent header" option in the Preferences) - the link is as follows: link - perhaps this will help?

ta,

richie