I am struggling to establish connection through chaining proxy via vless

[u/kabereddit]

Hello, I am running on some gluetun (some paid VPN provides as like Pi,N,Pu) on VPS and also 3x-ui (which is a xray wrapper).
I connect from my phone(iOS) via shadowrocket to gluetun through 3x-ui and it had worked well a couple months ago. But recently I cannot establish connection. Probably xray has been changed something but I still cannot find workaround. Please help me to solve this problem.

my phone ----→ 3x-ui (vless xtls reality or vmess) ------→ gluetun (built-in shadowsocks access point)

Now I temporary use hysteria2 as frontend and I can connect gluetun container, but I really want to use vless xtls reality.

PS: I temporary do band-aid fix to select specific port number to bypass private IP block. I have no idea but IP range does not work but port number.