https://techcrunch.com/2018/05/31/feeling-pressure-from-russia-telegram-says-apple-has-blocked-updates-since-mid-april-app-missed-gdpr-deadline/

Encrypted messaging app Telegram is feeling the squeeze out of Russia, where regulators are not letting up in their ongoing attempts to block the app because its publishers refuse to provide regulators with access to messages on the platform. Pavel Durov has announced that Telegram app for iOS is no longer updating after the iOS 11.4 update this week: the updates are being “prevented” by Apple after the regulator ordered Apple to remove Telegram from the App Store, and that has also meant that Telegram has not been able to issue its GDPR update to comply with the new European regulations. For now, Telegram is still in the App Store, albeit with an out-of-date, non-GDPR-compliant version of the app.

The news caps off what has been a troubling week for Telegram. Days ago, the Russian communications regulator Roskomnadzor (RKN) announced that it had made a formal request to Apple to stop distributing the app in the country, and also to stop enabling push notifications for those who already have the app downloaded. And that appears to be what is now transpiring.