Telegram’s macOS desktop app has been leaking both public and private IP addresses while making voice calls. The same flaw was present in Telegram for Desktop on other platforms, as well as in Telegram for Windows …
Inputzero explains that the desktop apps didn’t allow users to disable the peer-to-peer call option which created the vulnerability.
Telegram has addressed this by offering the option to disable peer-to-peer calls in version 4.1.
The iOS app recently got a major update with improvements to speed, battery efficiency and notifications.