`aria-hidden` remains after closing popover with nested dropdown

[qroll]

Component
Popover + InputSelect

Describe the bug
If you have a dropdown-based component in a popover, aria-hidden remains on the main page elements after closing both the dropdown + popover at the same time

This causes unit tests or e2e tests to fail as the locators typically check that the element is accessible

To Reproduce

<PopoverInline
    content="fox"
    popoverContent={
        <div>
            hello <InputSelect options={[]} />
        </div>
    }
/>

Steps to reproduce the behavior:

1. Activate popover
2. Activate select dropdown
3. Click outside of popover
4. Observe that aria-hidden="true" remains on the parent container

Expected behavior
aria-hidden should have been cleaned up when all floating element are closed

Additional context
Changing to modal={false} in ElementWithDropdown resolves this, so it may be some weird interaction with nested modal + non-modal floating elements