I did not want to make a too long title but this is true for Shadowform (Shadowdancer HLA) as well since it is normally mutually exclusive with Hardiness HLA as well. It works as well with the Dwarven Defender Defensive stance.
Observed: Character with Hardiness/Shadowform HLA get 80/90% resistance to physical damage when the Wish option "all party members get the temporary ability Hardiness" is chosen. Dwarven defender with defensive stance reaches 90(+innate)% physical damage resistance in the same situation Expected: Character with Hardiness/Shadowform HLA should keep 40/50% resistance to physical damage even if this option is chosen. Idem for Dwarven defender
Not that it is a game-breaking issue because you have to especially be looking for it, but still an unintended behaviour.
Edit: I'm playing on an unmodded Android version but IIRC this bug was already part of the old vanilla game, which is why I am positive it is not related to my installation.