I was going against the 2nd boss of the new Heist adventure. I had a Shifting Scroll in my hand until it eventually turned into Vaporize (a secret). I played the spell and when Soothsayer Zoie attacked with her Shadowboxer, it froze just as the secret activated. I can still move my mouse around the board, and I can highlight everything as normal, but I cannot proceed because it is completely frozen. My only option is to concede.
Chameleos and Shifting Scroll freezing with secrets has been reported multiple times and Blizzard is aware.
Try to restart immediately.
Ensure to search first before posting to reduce duplicate issue threads.