i haven’t really used Thanos until recently. I have him at 5/5/3. It appears when you down an enemy by creating a critical tile Court Death does not fire. It’s happened to me at least 3x now.
I don’t use him much but when I downed an enemy in dat required character via a match 5 Court Death still activated
(assuming that’s what you meant by creating a critical tile)
same issue here, procs don’t always work, and after a couple of tests, it’s not just the match-5s.