Get 5 viewers to join the chat at the same time?

I'm a Twitch streamer and I have a bug that 5 viewers should write in the live chat what they did but the archievement of Twitch is not updated

5 spectators should write in the live chat what they did

You probably know yourself that these are bots and do not need any further explanation.

Especially since the archiving becomes active only when the stream is finished.

Well, one was 2 seconds late