Custom components with list props do not update immediately in qwik

[kasavetova]

Describe the bug
Custom components with fields of type list do not always re-render when props change.

To Reproduce
Steps to reproduce the behavior:

1. Create custom component with list type
2. Render list
3. Change props (title in this example)

Expected behavior
Expect both renders of the list to update as the props change.

Screenshots

Additional context
It seems that adding optional chaining when using the list props for some reason works, even though the props are initialised with a default value so technically the contents of the field list shouldn't ever be undefined. Or alternatively I would expect to see an error when accessing the title or items props. I have observed this only for list type fields.

// component config
export const CUSTOM_COMPONENTS: RegisteredComponent[] = [
  {
    component: CustomList,
    name: "CustomList",
    inputs: [
      {
        name: 'items',
        type: 'list',
        defaultValue: [
          {
            title: 'Item one',
          },
        ],
        subFields: [
          {
            name: 'title',
            type: 'string',
            defaultValue: 'Item title',
            required: true,
          },
        ],
        required: true,
      },
    ],
  },
];

// CustomList component
export default component$((props) => {
  return (
    <div class={styles.list}>
      <p>This works</p>
      {props.items.map((item, key) => (
        <li key={key}>{item?.title}</li>
      ))} <br />

      <p>This doesn't work</p>
      {props.items.map((item, key) => (
        <li key={key}>{item.title}</li>
      ))}
    </div>
  );
});