Created attachment 1434939 [details]
Description of problem:
Version-Release number of selected component (if applicable):
Steps to Reproduce:
1. start Telegram
No hang up.
This is basically NOTOURBUG because Telegram statically links older fontconfig. what you have options so far is to ask Telegram to update Telegram with fontconfig 2.13 at least or ideally stop statically linking fontconfig in their application.
If you can't wait for their action, you could do take this workaround, copy fonts.conf to $HOME/.config/fontconfig and update the line like '<include ignore_missing="yes">conf.d</include>' to the location where you put the older config files shipped in 2.12.6 or before. e.g. <include ignore_missing="yes">/path/to/fontconfig-2.12.6/conf.d</include>