SAP WebDispatcher - RegRedirect - QueryString lost

Hi experts,

I try to forward an http request to https but there the query string is lost.
Any ideas how to solve this?

Thats how the rule looks.

if %{SERVER_PROTOCOL} !stricmp "https"

RegRedirectUrl /(.*) https://<domain>/$1

If I enter the url http://<domain>/test?parameter=value I get forwarded to https://<domain>/test

So the URL-Parameter gets lost.

I've already tried [QSAPPEND] at the end, but with no effect.

Kind regards