Telegram-desktop snap package doesn't run after reboot
Solution 1:
This problem affects me too. The first time I connected required snap interfaces to telegram, and it worked. But today the problem showed up itself again. I fix it by remove and install again telegram with:
sudo snap remove telegram-desktop
sudo snap install telegram-desktop
Note that by now exists a telegram-desktop package within default ppa and you can install it by
sudo apt install telegram-desktop