UoT does not work with anytls

Operating system

Linux

System version

ubuntu 22.04

Installation type

Original sing-box Command Line

If you are using a graphical client, please provide the version of the client.

No response

Version

sing-box version 1.14.0-alpha.23

Environment: go1.25.9 linux/amd64
Tags: with_gvisor,with_quic,with_dhcp,with_wireguard,with_utls,with_acme,with_clash_api,with_tailscale,with_ccm,with_ocm,with_cloudflared,with_naive_outbound,badlinkname,tfogo_checklinkname0,with_musl

Description

there is a network configuration for udp in trojan
but anytls does not have this network configuration

anytls protocol says udp is supported by UoT but sing-box does not support this

Reproduction

1. start both server and client
2. udp is blocked

Logs

fails silently. 
no logs are shown

Supporter

• I am a sponsor

Integrity requirements

• I confirm that I have read the documentation, understand the meaning of all the configuration items I wrote, and did not pile up seemingly useful options or default values.
• I confirm that I have provided the server and client configuration files and process that can be reproduced locally, instead of a complicated client configuration file that has been stripped of sensitive data.
• I confirm that I have provided the simplest configuration that can be used to reproduce the error I reported, instead of depending on remote servers, TUN, graphical interface clients, or other closed-source software.
• I confirm that I have provided the complete configuration files and logs, rather than just providing parts I think are useful out of confidence in my own intelligence.

The report names no source files or tests. Start by reproducing the UDP failure with sing-box 1.14.0-alpha.23 on Ubuntu 22.04 and compare the anyTLS and Trojan UoT configurations; done means UDP traffic works through anyTLS when UoT is enabled.