Atlanta-Arizona game last week.
Per Peter King in MMQB:
"But the NFL has instituted automatic reviews on all turnovers, with an odd rule attached: If a coach throws the challenge flag on a turnover before the review has begun, the coach gets a 15-yard unsportsmanlike penalty, and the replay-review is negated. If the officials on the field have already been buzzed, notifying them a review must take place on the field, there is a penalty but the review goes on. "
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