Rogue Metamorph spawning with magic-only mod Voidspawn of Abaxoth

A rogue metamorph spawned in my map with the mods 'Bonebreaker' and 'Voidspawn of Abaxoth' the latter of which should only appear on magic monsters, according to the official forum post from a few days ago:
"There are also three mods that only appear on magic monsters: Voidspawn of Abaxoth, Spirit Walker and Union of Souls (not described above)."
https://www.pathofexile.com/forum/view-thread/3267228

It also kills me instantly, but that could be a skill issue. I originally wanted to find out what the voidspawn mod did but it's not described in the above post, and that's where I discovered it's supposedly magic-only.

Hope this helps, and is unique. I wasn't able to find anything like it but most reports aren't very well-titled, and the ones that were reported since league launch described nothing like this.

metamorphs are made of white, magic, rare and unique parts from monsters, so it makes sense both a handmade and rogue metamorph can have magic monster mods.

I thought it was a magic-only mod for balance reasons, never had a metamorph kill me this fast. Bug or not, I'm looking forward to finding out what the mod actually does.