When the governing law is unsettled at the time of trial but settled-in defendant's favor by the time of appeals, should an appellate court reviewing for plain error apply the time-of-appeal standard of Johnson v. United States, 520 U.S. 461 (1997)

QUESTION(S) PRESENTED ; (1) When the governing law is unsettled at the time of trial but settled-in defendant's favor by the time of appeals. See: Carpenter v. United States, 137 S.Ct. 2211. Should an : appellate court reviewing for plain error apply the timeof-appeal standard of Johnson v. United States, 520 U.S. 461 (1997); also see: Henderson v. United States, 568 U.S. 266, 272 (2013); q + v ‘ a o " ia