It’s a closed position, which means that in a closed position, knights are better than bishops. This is why Stockfish plays the unbelievably anti-positional move, bishop takes knight because it evaluates that, in the long run, its bishop is not going to be an active participant in the game. It evaluates that if Black plays rook b8 and White plays knight b5 and rook b1, this bishop is simply an artifact; it’s just standing on the board and not actually doing anything useful. So, it plays bishop c3, which no human on Earth would play. Knight c3 and bishop a6, and now the knight goes to b5 again, Leela playing pure restriction chess, with absolutely frozen pawns everywhere.