Thanks for checking. That looks like something is blocking the network calls.
Maybe it’s only blocking IPv6, and you could try forcing IPv4 by adding this env variable to the docker stack: NODEJS_PREFER_IPV4=true
If that does not work, I’d recommend investigating what’s blocking the traffic to those IP addresses from your host.
You can also check if IPv6 calls to telegram are getting blocked by running curl -v6 https://api.telegram.org/ on the host machine.