Dieing of expedition's mob inside regular map while being full ES + Shavronne + Anti Life leech

I'm actually full energy shield with reserved life to have low life (PA)

I died several times days ago in those expedition (not logbook) event but still being full energy shield (While shavronne's wrapping equiped)

So I decide to put Sin Trek boots to prevent from life leech

It didn't do anything i'm still dieing from mob that looks like little skeleton making an incantation without moving, or hitting me, to be honest it's hard to really see. And recording is a problem since it doesn't happen a lot, but enough time to appears one time each 1-2h of farming to stop my xp grinding.

If anybody can tell me what damage could it be, shavronne's not working on a certain type of damage, or anything, cause it's quite ZZ to die from something i can't adapt and i'm lacking of knowledge.

Thanks!

I totally thought it was a bug, thanks a lot for your help