Error -1017 invoking CFNetworkExecuteProxyAutoConfigurationURL when Transfer-Encoding is sent instead of Content-Length

Hi. We are invoking CFNetworkExecuteProxyAutoConfigurationURL (https://developer.apple.com/documentation/cfnetwork/1426392-cfnetworkexecuteproxyautoconfigu?language=objc) to download and apply automatic proxy configuration. It is working OK for most of cases but an error -1017 is retrieved when the pac file response contains the header Transfer-Encoding -Transfer-Encoding: chunked- instead of Content-Length (If Content-Length there is no any problem) Do you know if there is some parameter to configure to allow to support Transfer-Encoding in CFNetworkExecuteProxyAutoConfigurationURL? I didn't find any documentation explaining how to do this or if this a limitation on the API. Regards