I use Hysteria in Russia - Moscow, says ping -1 but internet is working correctly, but i have problems with Telegram on Android and searched this post to know is there a internal telegram proxy support or no, because v2rayNG or Nekobox is not working with telegram on phone...
That does not sound right. Verify that you are actually connected to the proxy first https://doesmyvpn.work
If the issue persist please send us a ticket and tell which exact server and protocols you used, so we can double check it ourself. Thanks.