The minion shuffle anomaly seems to be bugged on Tombs of Terror. I had a 2/2 Treant die during a run of chapter 2, after it EoT attacked my opponent’s Mountain Fire Armor due to the Chapter 2 twist. When I drew the Treant again the game displayed it as a 2/-2, and when I played it the minion died immediately. I unfortunately did not think to take a screenshot of this occurring.
Occured on Android phone.