(Aura + Divine blessing support + Cast when stunned support) It doesn't work

Hello guys!

Hi I'm trying to make an Autobomber build with Cast When Stunned and Cast When Damage Taken.
And as a defensive layer I was thinking of using auras like Purity of Elements which would be triggered by a Cast When Stunned and unfortunately I could see that it didn't work.

The Cast When Stunned says that it doesn't work with spells that have mana reservation, however with Divine Blessing the auras don't have reservation anymore and just get a fixed mana cost.

I don't know if it's voluntary or a bug due to a missing interaction.

In any case, I think it's a shame not to be able to use it.

Did you make sure you have enough mana? Auras activated via divine blessing can cost a couple hundred mana and you still need to spend it when triggered, it's not for free.

If you do have enough unreserved mana, it's probably a bug.

Yep I have the mana and so when I combine the 3 gems I can cast my aura manually and I see that it doesn't use Cast When Stunned.

If the 3 gems worked together the spell should have been grayed out and it would be impossible for me to cast it manually, like all spells that are cast with triggers gems.