West GIB has full knowledge that his heart card is worthless. West also knows, nearly 100% certainty, that South has the ♠K. At trick 9, when South cashes the ♦K, even a novice human in the West seat would discard a heart.
Not our favourite bot, though. Our hero west chucks a spade! Absurd! Absurd!! Absurd!!!
PS: Worth linking this example from a few weeks ago where the bot messed up a 2-card ending (https://www.bridgeba...ard-ending-how/)

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