Having the same issue and it's really frustrating. Dice already hate me and now the game's math is ganging up.
I'm on iOS, Poison Pill is the adventure I believe. I noticed it before and thought maybe I was missing an effect. Now I'm certain it's a very bad bug. The latest example is the rogue rolled an eleven against a Goblin Commando (9). She had used her power to discard and gain dice plus I had a short sword. 11 I think, YEAH got 'em!! Then he doesn't go away but hits me, Discard 3. So I spent the last five minutes of my life making an account and typing this message and now I'm kind of sad that I'm not even at the mercy of the dice but the game's own random math.