I assumed this was a bug, but not entirely certain.
During Jormag pre, if i have one of the dragon crystals targeted and summon, say, a phantasmal duelist, it will attack the crystal, but if I summon a phantasmal swordsman doing the exact same targeting, it will target a nearby enemy instead.
I haven’t tested this out on other objects, but something I noted the other day during jormag pre.