Design Arena says hiding move labels drops a model to 0/4 on game identification

Design Arena says that after it hid the move labels, a model's game-identification score fell to 0/4.

The model said three times that it could not identify the game. Design Arena concludes that the move labels were doing more of the work than it first appeared. The post is a single X update, and the report gives no details of the test beyond these results.