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Sorry to hear that but not sure why you are telling me. You should talk to them about it maybe they think it is plagiarised.

Also this post is from 5 months ago and is completely unrelated to the issue at hand.

Edit - I also double checked and those downvotes have a tiny weight so I wouldn't even bother worrying about it.

Try talking to them and if you get no response then don't stress.

-However commenting inappropriately in other posts might get you into trouble with others and you might get flags that have more of an effect.