A conviction in a criminal case may be reversed on appeal on the ground that a juror in the case was absolutely disqualified from service under Article 35.19 of this code only if:
(1) the defendant raises the disqualification before the verdict is entered; or
(2) the disqualification was not discovered or brought to the attention of the trial court until after the verdict was entered and the defendant makes a showing of significant harm by the service of the disqualified juror.