No one, and, I emphasize NO ONE shoots with that type of weaponry cross the border three times by mistake and I don't believe for a second that there would've been an order to fire.
Why would anyone start a war by shooting a farm house with artillery?
There is a reason why there has been no civilian casualties despite Russian claimed heavy artillery shelling throughout the week: the shelling has never happened. The only reason to claim such actions is to draw a picture of a warmongering nation (Ukraine) to justify the Russian invasion. Once the Russians start announcing civilian casualties the troops start moving.