Has it happened to anyone that White Hole petrifies people regardless of if their HP is 100% topped off?

It happened twice today. The thing is, we use super heavy mitigation for Fire III and Holy. I got a critical Adloquium on both occassions, making it so people took barely any damage from both those attacks. We had HoTs from Aspected Helios, used a fully charged Earthly Star, and Indomitability, which was like 80% overheal, I'm pretty sure.

Yet, when White Hole finished casting, literally the entire party got petrified.

My theory is that White Hole is demanding that you heal through the entire damage of Fire III and Holy, even if the damage wasn't actually dealt to the party. This also only seems to happen with critical Adlos...

It's annoying as all hells, to say the least.

Has it happened to anyone else?