Twice while I was trying to free Shadowheart from her pod during the Prologue, I roll a Natural One when using the 'Illithid Power' option. However, I was playing as a Cleric both of these times, and the wisdom proficiency modifier (along with the bonus granted from the Guidence cantrip) was added to the result despite Critical Failure, freeing Shadowheart.
Benefitial or not; and rare as it might be, a bug is still a bug and I would like to bring it to the attention of the technical experts at Larian Studios.