Blocked for no reason

While looking at my recent games, I have found out that a particular user block me.

You are blocked from this user's notes!

I was pretty surprised to see that message. I did not do anything to him. If we will try to look at our game, we can observe that he failed to see that he will be mated in one move. That's all, still wondering why I get blocked by this particular user.

It may be really shallow to whine about this, but i'm pretty upset.