Today I got this in syslog (an excerpt):
telegram-desktop_telegram-desktop.desktop[8823]: Fontconfig warning: "/etc/fonts/conf.avail/25-arphic-uming-bitmaps.conf", line 11: Having multiple values in <test> isn't supported and may not work as expected
telegram-desktop_telegram-desktop.desktop[8823]: Fontconfig warning: "/etc/fonts/conf.avail/40-generic.conf", line 27: Having multiple <family> in <alias> isn't supported and may not work as expected
telegram-desktop_telegram-desktop.desktop[8823]: Fontconfig warning: "/etc/fonts/conf.avail/41-arphic-uming.conf", line 16: Having multiple <family> in <alias> isn't supported and may not work as expected
telegram-desktop_telegram-desktop.desktop[8823]: Fontconfig warning: "/etc/fonts/conf.avail/40-generic.conf", line 27: Having multiple <family> in <alias> isn't supported and may not work as expected