Definitely a bugged interaction. No SSes, but various scenarios while playing SPlat:
a) Played Neuro, he purifies (+2 blue). I hit him next turn with one dune scorp (+1 yellow). He plays a card, counter disappears. He plays another few cards, still no counter. Next turn, I hit him again, and neuro counter shows up at 5.
b) Played Neuro, he purifies (+2 blue). Next turn, scorp hits (+1 yellow). He plays nothing, but congeals my scorp with octopus. Turn ends. I do nothing, turn ends. He plays cards, no effect on neuro.