Server misconfiguration in docker ,Centos 7 Host ,please help ,thanks!

[alisantouri1993]

What version of shadowsocks-libev are you using?

Version 3.3.5 + Simple-Obfs 0.0.5 plugin

What operating system are you using?

Centos 7 + Docker 23.0.4

What did you do?

I have configured a shadowsocks server with TLS mode obfuscation (I have mentioned here simple-obfs , but I've also test it with v2ray-plugin that uses real TLS handshake, but either give me no gain),
When the first client connects to server,everything is well,but when that client start surfing internet, the page loading speed is getting slower & slower until it gets stuck and client is getting forced to close browser ( terminate opened connections )
I must mention some applications like Instagram do not working at all!

What did you expect to see?

Surfing Smoothly.

What did you see instead?

Here is something peculiar in my docker logs and I don't know from where it came from [ A lot of this line is in my logs] :
-- [8388] connect to 10.10.34.36:853

that's an private ip address + DNS over TLS port 853,
and of course there are a lot of ERRORS printed by simple-obfs & ss-server

What is your config in detail (with all sensitive info masked)?

{
"server":[0.0.0.0],
"mode":"tcp_and_udp",
"server_port":8388,
"password":"***",
"nameserver": 1.1.1.1,1.0.0.2,2606:4700:4700::1112,2606:4700:4700::1002"
"timeout": 300,
"method":"chacha20-ietf-poly1305",
"plugin":"obfs-server",
"plugin_opts":"obfs=tls"
}