In a statement posted today, Durov notes that no updates have been approved ever since Russia ordered Apple to remove the messaging app from the App Store because it wouldn't provide decryption keys to its user's communications.
Unfortunately, some Telegram features, such as stickers, don’t work correctly under iOS 11.4 that was just released – even though we fixed this issue weeks ago.
Apple has been preventing Telegram from updating its iOS apps globally ever since the Russian authorities ordered Apple to remove Telegram from the App Store. Russia banned Telegram on its territory in April because we refused to provide decryption keys for all our users’ communications to Russia’s security agencies. We believe we did the only possible thing, preserving the right of our users to privacy in a troubled country.
Unfortunately, Apple didn’t side with us. While Russia makes up only 7% of Telegram’s userbase, Apple is restricting updates for all Telegram users around the world since mid-April. As a result, we’ve also been unable to fully comply with GDPR for our EU-users by the deadline of May 25, 2018. We are continuing our efforts to resolve the situation and will keep you updated.
Sorry for the inconvenience and thank you for your patience.
Apple has yet to comment on the matter. You can download Telegram Messenger from the App Store for free. Please follow iClarified on Twitter, Facebook, Google+, or RSS for updates.