singleLabel slot can not read nested property

[Mohammad Faisal]

> <span slot="noResult">Oops! No elements found. Consider changing the search query.</span> <template v-slot:singleLabel="{ option }"> <div>{{ option.machinery.en_name }}</div> </template> <template v-slot:option="{ option }"> <div>{{ option.machinery.en_name }} <br>Batch No: {{ option.batchNo }}</div> </template> </multiselect>

For this code option slot can read the nested property which is en_name, but the singleLabel slot throws an undefined error.