How to preserve data in a HTTP 302 redirect of a POST

Hello, I am facing similar challenge. I insert a new value to request header before redirect. seems that F5 drops the new value somehow.

HTTP::header insert "appKey" "$app_key" HTTP::redirect "https://$NewHost[HTTP::uri]"

if I log header into logs, I can see that appKey gets inserted. however when I check at NewHost, I see the request came in with no appKey value in the header.

in other cases when I had to do the same, it worked but there was no redirect. so I am certain that redirect has something to do with it. it's just wont let through any newly added name/value in request-header.

any idea how can I insert new name/value into request header and make redirect call right after ( without losing new added value).?

thank you in advance.