No i think it was something with favicon request..
now i always get getaway timeout....

1. also try from different server with nginx 1.8 nothing helped..
proxy_ssl_verify off;
proxy_ssl_certificate /etc/nginx/ssl/test/test.pem;
proxy_ssl_certificate_key /etc/nginx/ssl/test/test_key.pem;
proxy_pass https://domain.com;
2. try same with apache 2.4 all worked with:
SSLProxyEngine On
SSLProxyVerify none
SSLProxyCheckPeerCN off
SSLProxyCheckPeerName off
SSLProxyCheckPeerExpire off
SSLProxyMachineCertificateFile /etc/httpd/ssl/test.pem

ProxyPass "/test" "https://domain.com"


Maybe something with ssl renegotiation in nginx???