That popup message is coming with updateServiceNotification from Telegram backend.
[23:58:28.811 01-0001754] (dc:2) Recv: { core_message msg_id: 6753703395900790785 [LONG], seq_no: 85 [INT], bytes: 184 [INT], body: { updates updates: [ vector<0x0> { updateServiceNotification flags: 1 [INT], popup: YES [ BY BIT 0 IN FIELD flags ], inbox_date: [ SKIPPED BY BIT 1 IN FIELD flags ], type: "API_ERROR_UPDATE_UNOFFICIAL" [STRING], message: "Error. Please update your app to the latest version or switch to the official version of Telegram." [STRING], media: { messageMediaEmpty }, entities: [ vector<0x0> ], }, ], users: [ vector<0x0> ], chats: [ vector<0x0> ], date: 1572469107 [INT], seq: 1774 [INT], }, } I believe we are able to backport a new version to Bionic Beaver. At least v1.8.15 is successfully compiled against Qt 5.9.5 and FFmpeg 3.4.6. Moreover, we could provide a new version via the bionic-updates repository like Firefox or Thunderbird get updates -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1823299 Title: Package out of date To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/telegram-desktop/+bug/1823299/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs