Arrow size/thickness does not always match best-move evaluation

[dcwigley]

When using the Stockfish for Mac engine to get the evaluation for multiple lines of chess moves, the arrow size/thickness shown on the board does not always match what the engine says is the best move. The biggest arrow on the board might be on the wrong piece. When I saw it happen, I gave the program time to correct itself, but it didn't, even after playing through the moves again. I sent a picture of the event. In the picture, the biggest arrow is on the queen, but according to the evaluations, it should be on the bishop (which has a smaller arrow).