Enfolding Dawn Pilgrtim Vestments spirit bug

When I have my rare chest on with +46 spirit I have 2/310 spirit reserve left,
when I equip the Enfolding Dawn Pilgrtim Vestments which gives +100 spirit, I have 21/310 spirit reserve instead of the expected 56/364, both chests are not corrupted, I have triple checked the amount of minions I have before and after swapping both chest items, and they stay the same, I tried unsummoning some minions, and it all stays the same. it seems like there is a calculating bug with the unique chest Enfolding Dawn Pilgrtim Vestments.