@cybecom I believe it definitely will affect the plugin.
Line 714 on /inc/web-to-lead.php we see:
$url = apply_filters( ‘gf_salesforce_request_url’, sprintf(‘https://%s.salesforce.com/servlet/servlet.WebTo%s?encoding=UTF-8’, $sub, $type), $args);
…. where “%s” is either “www” or “test”. That value now needs to be set to “webto”….