Ask HN: What is up with all the glitchy and off-topic comments?

I see glitch comments like this on a fairly regular basis:

> 13 60 well and t6ctctfuvuh7hguhuig8h88gd to f6gug7h8j8h6fzbuvubt GB I be cugttc fav uhz cb ibub8vgxgvzdrc to bubuvtxfh tf d xxx h z j gj uxomoxtububonjbk P.l.kvh cb hug tf 6 go k7gtcv8j9j7gimpiiuh7i 8ubg

https://news.ycombinator.com/item?id=47068948#47117224

or this:

> 1662476506

https://news.ycombinator.com/item?id=47121737

or this:

> Аё

https://news.ycombinator.com/item?id=47126475

Sometimes it's coherent, but completely off topic, like this

> when is fivetran coming?

https://news.ycombinator.com/item?id=47130567

Is clawd running amok, or is someone running botnet C&C via https://news.ycombinator.com/noobcomments or what gives?