I tried to add the ♥T play into my diagram but it didn't stick when I inserted. Apparently the hand editor can only handle a full round or something.
Anyway. GIB led the ♥T.
If GIB isn't just randomly selecting a card, what logic is it using? Does anyone know? Even if it decides, for whatever reason, that hearts is the best suit to lead, surely leading the ten from T8x in the blind can't be right. If the code that decides what suit to lead is so sensitive and unintelligible as to strike fear into the heart of anyone thinking of modifying it, at least changing which card it leads from Txx in the blind shouldn't be too difficult.