Please update Telegram to recently released version 1.1.0.
https://github.com/telegramdesktop/tdesktop/blob/v1.1.0/changelog.txt
Currently stable version is 1.1.2. Yet I have problems with calls. There is quite reproducible crash: https://github.com/telegramdesktop/tdesktop/issues/3403 and looking at the trace it looks like crash is realated to pulseaudio. I hope https://github.com/telegramdesktop/tdesktop/issues/3412 fixes this.
Created attachment 474530 [details, diff] telegram-desktop-bin.ebuild.patch They released 1.1.6 alpha version. I'm testing it currently but meanwhile I'm attaching ebuild.patch that will allow to install alpha versions. Apply patch and give it telegram-desktop-bin-1.1.6_alpha.ebuild name to have latest telegram version.
1.1.23 is in the repo