Incorrect interaction between Revenant's Thrall and Tomb Guardians

[(XBOX)LiChrysalis]

When casting Thrall on a Tomb Guardian from the Sands of Inaros quest and then killing it while under Thrall's effects, the resulting clones will be allied to the player. Non converted guardians will not attack it, and you can not harm it. Only tested in simulacrum, unsure if it works in the quest