Steps to Reproduce

<zscript><![CDATA[
List Items = new ArrayList();
for (int i = 0; i < 5; i++) {
    Items.add("data "+i);
}
ListModelList model = new ListModelList(Items);
model.addToSelection(model.get(0));

	]]></zscript>

    <listbox model="${model}" >
        <listhead>
            <listheader label="listbox header"/>
        </listhead>
        <template name="model">
            <listitem label="${each}"/>
        </template>
    </listbox>

1. run the code above with za11y.jar included
2. select an item
3. open chrome developer tool > lighthouse
4. analyze page load with the settings:
Mode: Navigation
Device: desktop
Category: Accessibility

Current Result

Expected Result

no such error

Debug Information

• According to https://developer.mozilla.org/en-US/docs/Web/Accessibility/ARIA/Attributes/aria-activedescendant:

  The value of aria-activedescendant refers to an owned element of the controlled element. For example, in a combobox, focus may remain on the combobox while the value of aria-activedescendant on the combobox element refers to a descendant of a popup listbox that is controlled by the combobox.

That attribute should be set on a parent/container element, and its value refers to a descendant.

• the element that contains aria-activedescendant should also have a role grid

Workaround

remove aria-activedescendant on z-focus-a