Group calls not connecting on IPv6-only networks

[danog]

Steps to reproduce

1. Enter a group call on an IPv6-only network (NO nat64, dns64)

Expected behaviour

The call connects (afaik an ipv6-capable reflector should be involved either way)

Actual behaviour

The call gets stuck on connecting

Operating system

Mac OS 15.4.1

Version of Telegram Desktop

5.13.1

Installation source

Static binary from official website

Crash ID

No response

Logs

[john-preston]

Can you please:

1. Enabled debug logs by typing "debugmode" in Settings page from your keyboard (as a game cheat code).
2. Agree on enabling of debug logs.
3. Reproduce the issue - try connecting to a group call and wait for a minute, then leave the group call.
4. Open settings and type "viewlogs", then send the "last_group_call_log.txt" from "DebugLogs" folder to me, https://t.me/preston