So, I've run into a Goblin Warchanter twice now, and both times had issues - the first one was annoying, the second is a game-breaker.
The first time, it went through the "everyone in the party make a Wisdom check" successfully, but when I returned to the character who encountered the Warchanter, the Warchanter card wasn't visible. The rest of the UI still worked, so I could modify dice, roll, and was able to proceed, but the warchanter was missing.
The second time through, I'm stuck. Seelah encountered the warchanter, Amiri can make her roll, but Merisiel is next in line, and when it gets to her there's no UI - no "difficulty/pick attribute" banner, no dice pool, no cards highlighted to modify the pool, nothing.
-Quitting and retrying doesn't fix the issue; loading the save loads at Amiri's Wisdom check, and rolling the dice leads to Merisiel and a stuck game.
-Merisiel's location currently has a Collapsed Ceiling visible on the top of the deck after a failed check; I'm wondering if the problem isn't the interaction between the Ceiling card and the Warcaster.
-If it matters, I'm doing the Trouble in Sandpoint scenario, on normal, with a 6-character party. Seelah's at the Shrine to Lamashtu, Amiri's in the Catacombs of Wrath, and Merisiel's at Junk Beach.
I'll leave this party here for a day or two in case there's a workaround, otherwise I guess I'll have to forfeit the scenario.