So I encounters this error while playing Marin
On the same turn as discovering my trinket, Master Ngyuen’s hero power offered Rat King’s hero directly after - but it only presented one option, then for the rest of the game, it only kept presenting one option, and only from Rat King’s hero power.
I can only surmise that the game prioritized Rat King’s HP over MN’s HP for some weird reason when selecting my trinket.
Three way fun time between all 3 powers, apparently.