Wraithlord (the helm) and big boy

I was playing some games with a Rogue last night who spammed out like turrets.
My Wraithlord kept eating his turrets all the time render it useless.
Thought it was only suppose to eat my pets and minions, not party things.

Gonna try catch this if i stream.
Twitch : at 31min marker i ask the rogue to make some traps, after the rogue put out some traps, the wraithlord just stands there trying to comsume the traps, its the same in normal maps.