Filter list view using lookup column

so I have a listview in my nintex form, when I try to filter the list view based on a value for a lookup column... it doesn't work! however, when I try to filter for another column it works perfectly. Why is that? First try, didn't work Listview > filtering: filter listed item: mylist where field: lookup_column filtered by value: 123123 Second try, worked Listview > filtering: filter listed item: mylist where field: column filtered by value: abcd How can I filter a list based on a lookup column?