I was wrong. He/she could see well. He/she just slept or he/she was simply an idiot. It happens time to time. Just the players usually agree. LJK hit the ball from above the net height and from outside (like when you want to hit a roller, just the ball came from upward). Then the ball slipped from the side and reached the floor quite close to the table. If he would hit the edge, then the ball should have bounce upward and out, but even in the worst case it should have bounce sideways.
If it was an edge ball, then it break the rules of physics. I couldn't believe the umpire scored it to LJK.