Cypress Command never runs, doesn't fail, and returns some meta data instead

DEFINE COMMAND

Cypress.Commands.add('getLocalStorage', () => {
  const state = window.localStorage.getItem('state');
  return JSON.parse(state);
});

USE COMMAND

const localState = cy.getLocalStorage();

RESULT

localState variable holds this value:

chainerId: "chainer6"
firstCall: false
specWindow: Window {parent: global, opener: null, top: global, length: 0, frames: Window, …}
useInitialStack: false
userInvocationStack: " ......"

Using version 5.5.0