Apache 2.0.5x wrong Apache hostname in Via Header when used as Reverse Proxy (Apache Users)

Apache 2.0.5x wrong Apache hostname in Via Header when used as Reverse Proxy

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To: users@xxxxxxxxxxxxxxxx

Subject: Apache 2.0.5x wrong Apache hostname in Via Header when used as Reverse Proxy

From: ABAPGUY <abapguy@xxxxxxxxx>

Date: Mon, 12 Mar 2007 22:20:03 -0700 (PDT)

Reply-to: users@xxxxxxxxxxxxxxxx

Hi all ,
using Apache 2.0.58 and 59 as a Reverse Proxy I am seeing the wrong hostname in the Via header that Apache sends to downstream servers .
e.g. Apache has a load balanced alias = host1.xxx.com although the server hostname is actually = apache.xxx.yyy.com in the xxx.yyy.com domain

All clients access Apache by https://host1.xxx.com
I have PreserveHostname on

But with UseCanonicalName Off I see the following in the Via header = host1.xxx.yyy.com

Why do I not see Via= host1.xxx.com ?
I know there are some UseCanonicalName off bugs in earler releases ..does that apply here ?

Regards
Daniel