Current package of Telegram-Desktop is dynamically linked with very old libs.
[code]$ Telegram 
Telegram: error while loading shared libraries: libxml2.so.2: cannot open shared object file: No such file or director[/code]
Current version of libxml2:
<pre>
lrwxrwxrwx   1 root root        13 24 juin  01:54 libxml2.so -> libxml2.so.16
lrwxrwxrwx   1 root root        17 24 juin  01:54 libxml2.so.16 -> libxml2.so.16.0.4
-rwxr-xr-x   1 root root   1444624 24 juin  01:54 libxml2.so.16.0.4
</pre>
Not libxml2.so.2
And if a symlink is created, several other old version of libs are asked including libtheoraenc/dec etc.
			
				