 on the left, the natural z-order is unchanged. The first
        iframe is underneath, the second is on top. <em>This is the box that
        exhibits the bug.</em>
      </p>
      <p class="description">
        In the box on the right, the z order has been reversed, so that the
        first iframe is raised to the top and the second iframe goes
        underneath. Text selection in this box behaves as expected.
      </p>
    </div>

    <hr />

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