Does your shadowsocks server have serverspeeder or BBR or lotserver?
I’d enabled TCP BBR for shadowsocks VPS. So it’s with BBR enabled from now.
It’s seems that the FASTOPEN really speedup the webpage ,but sometimes I cant open some pages without refresh .so I false the FASTOPEN and the situation is no longer appeared
Please try to pick one of Public Nodes at Setup - Program - Full VPNThey're provided by https://www.vpngate.net/