Logging in to telegram is extremely slow on both macOS and iOS. It takes several minutes to initially connect, although it works fine thereafter.
From debugging the connection it's repeatedly trying to connect via IPv4 (which fails), and only after several minutes is it trying to use IPv6 (which works).
Turning off IPv4 does not solve the problem, as it continues trying to connect via NAT64 using the built in macOS CLAT.
Steps to reproduce
1, configure a network with working IPv6 connectivity and broken IPv4 (eg where there is a defective NAT gateway)
2, start the iOS or macOS telegram client
3, initial connection is extremely slow and takes several minutes
Device info
Telegram macOS 10.1.1 (252074) APP_STORE, MacBook Pro M1 Max, 14.0
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