Access JavaScript filter function in object of functions: Cannot read properties of undefined (Vuex store)

The problem in my vuex store index.js:

I want to filter an array with another array. If I access the filter function in its object I get an:

TypeError: Cannot read properties of undefined (reading 'includes')
    at aspect_ratio (index.js?9101:72:1)

I have all my filter functions in an object like this:

export const filter_functions = {
  form_factor_landscape: (obj) => {
    return obj["Form Factor"] === "Landscape";
  },
  form_factor_portrait: (obj) => {
    return obj["Form Factor"] === "Portrait";
  },
  aspect_ratio: (obj) => state.current_features.includes(obj["Aspect Ratio"]),
};

In my getters I want to access the aspect_ratio filter like this:

export const getters = {
  filtered_items(state) {
      const filteredArray = [...state.allHandhelds].filter(
        filter_functions[state.current_sort]
      );
      return filteredArray.filter(filter_functions.aspect_ratio);
    } 
  },
};

my state is like this:

export const state = () => ({
  current_sort: "all_handhelds",
  current_features: ["a", "b", "c"],
  allHandhelds: [],
});

My thoughts:

It seems like there is some problem with accessing the object with the filter functions. Or more precisely accessing the current_features array from the state.

Strangely if I just take the filter function outside the object and directly embedd it everything works. Like this:

return filteredArray.filter((obj) => state.current_features.includes(obj["Aspect Ratio"]));

Any idea what I’m doing wrong?