So I was talking in chat like usual and got double chatbox warnings at the same time, I spoke with the mod in chat and they said it wasn't them so I brushed it off until another pack said they also got them too

So here some screenshots, they came in at exactly the same time. I went through and reviewed my chat posts to double check and sure as ever nothing was wrong with them

It's not a bug. Sometimes it's an accident. Or you could trigger something with what you wrote.