For Vue components, the v-model on a multi-combo box and every component must bind to the underlying object. :value-primitive="false" doesn't work as per some suggestions. v-model binding to the underlying object is a MUST HAVE, Top priority, number one with a bullet. Without it, your components are a PITA to use and my current proof of concept might end here and we won't use your components with some bigger projects coming down the line.