I got the same and I wrote an actual review.
I didn't even get a msg saying why, so I had to guess that it was review I wrote.
My last warning was 4 years ago, this one because I said to someone who was ridiculing another member:
"I have a 6 yo nephew, he also think his opinions are facts." I think this is pretty innocent.
According to moderators this was: Abusive, overly aggressive, threatening, or to "troll".
That time I got a msg saying I got a warning at least.