Bug: Cavern of Souls

The Cavern of Souls land, when used to cast a creature spell of the type you choose when you play the land, is supposed to make the spell non-counterable. It currently does not do this. The AI just played a Counterspell card to counter a summon I made with that land, and the spell was countered normally. Thus, there is something wonky with the way the Cavern of Souls is implemented.
Thanks for all your hard work on Forge!
Thanks for all your hard work on Forge!