Issue with latest Exchange iApp template? invalid irule?

So on this load balancer this issue still persists. This is after upgrading to 11.5.0 and to the latest Exchange template 1.3.0. This is only happening on this load balancer and not its partner in the opposing DC.

I suspect it's a bug and its causing issues with EWS and Outlook Anywhere. How could I work around it, I suspect it's a version of the iRule that used to live in Common partition that now appears compiled into the APM Exchange config:

 when HTTP_RESPONSE_RELEASE {
        if { ! [info exists user_key] } {
            return
        }
        log -noname accesscontrol.local1.debug "$static::ACCESS_LOG_PREFIX HTTP response: status:           [HTTP::status]"
        log -noname accesscontrol.local1.debug "$static::ACCESS_LOG_PREFIX HTTP response: Server:           [HTTP::header Server]"
        log -noname accesscontrol.local1.debug "$static::ACCESS_LOG_PREFIX HTTP response: Content-Length:   [HTTP::header Content-Length]"
        log -noname accesscontrol.local1.debug "$static::ACCESS_LOG_PREFIX HTTP response: WWW-Authenticate: [HTTP::header WWW-Authenticate]"
    }