This happened right after the quest journal updated, while I was in the game on the bottom node of harvesttide. I was playing, then the quest journal update hit, which prevents anything from happening while it does it’s thing, then I went and foretold a card, and it never completely cast. I have screenshots, but this system only allows me to post url links, apparently. The battle log showed a red circle with a line through it on the turn showing, I imagine, an incomplete support cast.
Then I could no longer continue the game, as I was locked out of everything.