Anyone had this, had it twice yesterday and hadn't had it in over 1000 pre last patch games.
In short, your keeper fails to reposition and just stands in the same spot leaving the goal wide open.
Its very noticeable when it happens.
Yesterday my opponent was attacking with his 2 attackers. The ball carrier was running in line with the far post thereabouts, so the keeper was a few feet from his far post. The carrier then squared to his team mate again almost parallel to the near post but the keeper remained rooted to the spot leaving about two thirds of the goal open for a simple goal.