When playing Svitlana's Inquisition 1hp yesterday on two occasions the Shade with NEB attatched had Absorbing Blocks, but when I shot a magic attack at it and Absorbing Block triggered, it didn't get damaged. I'm not sure what more information I can give on this bug though.
I've seen it work, so this probably isn't a blanket case. Did the Shade also have something like Open Wound on it? Was the attack maybe not technically "Magic" ? If you see this again, it would be helpful to provide screenshots and battle logs. Thanks!
After talking with Mr. Mogel we concluded it was probably Entangling Roots that I used on both occasions. And that's not a magic attack. That was probably the case. (We made it though, for those who were wondering.)