Larian Studios Forums Baldur's Gate III Baldur's Gate III - Build Discussion Barbarian / Monk

I wanted to make a Monk that could Rage but I was disappointed to learn the unarmored bonuses to AC didn't stack. Is this a bug or is there a reason they don't?

This is not a bug. It is part of the DnD rules:

As per the multiclassing rules on page 164 of the Player’s Handbook - “Unarmored Defense. If you already have the Unarmored Defense feature, you can't gain it again from another class.”

Luckily, you can swap between which version of Unarmoured Defence you utilize. Whichever stat is highest, will be the one that is utilized.

Ah thanks. I've only played BG3. Maybe there should be a warning on it like there is for Extra Attack.