A party is not allowed to withdraw consent to a Rule 11 agreement after the trial court has rendered its judgment. See Quintero v. Jim Walter Homes, Inc., 654 S.W.2d 442, 444 (Tex. 1983); In re R.F.; No. 09-16-00240-CV, 2018 WL 2054930, at *4 (Tex. App.—Beaumont May 3, 2018, no pet.) (mem. op.). A trial court renders judgment when it "'officially announces its decision in open court or by written memorandum filed with the clerk.'"