Bug Description:
Giant Caterpillar is not transforming all the time. It has to do with Chlorophyllia. If you get the threshold for the caterpillar to change with Chlorophyllia transforms to Giant Cocoon but never changes to Gianet Butterfly. The counters just keep increasing.

Bug Reproduction:
Play two green gems, then play Giant Caterpillar, then play Chlorophyllia, last transform to Giant Cocoon. Important: must not play another green gem before transformation. If you play three green gems a new Giant Caterpillar will go to Giant Cocoon to Giant Butterfly. But the old one will never finish.