My bishop has magic guard on with 14k MP but died when BF touched. Doesn't make sense to me as my magic guard should've absorbed it and saved myself? And my Hero partner also complained that her power guard wasn't working against BF after she died too. Bf does 12k damage max.
You didn't have invincible on right? 2130*5 is 10650, magic guard only lets mp tank 80% of the damage.
Tsue is correct, there is no bug at play here. Also confirmed that Power Guard is working as intended.