It's important to point out here that Russia has done MANY brainless things during this war, things that actively harmed their position in the world. Miscalculating an attempt to change the calculus is definitely a possibility.

Or Russia did it for the internal audience: "Look at what they did the big evil US just wants europe to suffer we are the best"

I'm not sure it makes sense for either the US or Russia to have done it. I bet it was some smaller NATO country or ukraine just whistling in the corner and giggling a little as everyone points fingers.