You need to mention your bot in 'user' group chat (i.e. type @YourBot)

So I have worked with this script before - and it worked perfectly!

For some reason, all I get is: 'You need to mention your bot in 'username' group chat (i.e. type @YourBot)'.
I (of course) mentioned the bot in the group chat, that did not help. I re-registered the bot, disabled privacy mode, nothing seems to help.. Any ideas what I might be doing wrong, or some recent update to Telegram?

So the steps:

Create bot, fill in API key in zbxtg_settings.py
Create a group channel and add bot to it

Test group functionality with '--group' (test without the --group param works):

```
username@host:/usr/lib/zabbix/alertscripts$ sudo -u zabbix ./zbxtg.py Username "Hi there" "Hi there again" --group
zbxtg.py: You need to mention your bot in 'Username' group chat (i.e. type @YourBot)
```