Consider these steps from (possibly duplicate) bug 1524307
Steps to reproduce:
1. Receive new message while phone is locked.
2. Unlock phone and swipe down message indicator
3. Press on the monochrome telegram icon next to the new message to open it in the app
Note to self:
Consider these steps from (possibly duplicate) bug 1524307
Steps to reproduce:
1. Receive new message while phone is locked.
2. Unlock phone and swipe down message indicator
3. Press on the monochrome telegram icon next to the new message to open it in the app