The Lutheran Reformers were concerned about reserving the consecrated elements for Christ’s instituted sacramental use. In other words, consecration, distribution, and eating were sacramental; but a Corpus Christi procession was not sacramental. Nonetheless, they did not countenance disrespect for any consecrated element:
When a young clergyman named Adam Besserer
“carelessly mixed consecrated and unconsecrated hosts, he was suspended from his duties and placed under arrest pending a ruling from Wittenberg. Luther’s written opinion declared that the pastor was guilty not only of negligence but also of despising God and man by publicly treating consecrated and unconsecrated hosts alike. His judgment was that the pastor should be released from prison but expelled from the churches.”
— The Blessings of Weekly Communion at 254, by Wieting;
citing Stephenson, “Reflections on the Appropriate Vessels,” 16.
Luther also wrote to another pastor who had cited the doctrine of sacramental action to justify mixing consecrated with unconsecrated hosts saying, “Perhaps you want to be considered a Zwinglian,” and “the Lord whom you oppose will oppose you in return.”
(Luther’s First Letter to Wolferinus: Concordia Theological Quarterly; October 1979).
The Formula of Concord incorporates Dr. Luther’s definition and explanation of the sacramental action (in the Solid Declaration, Article VII The Holy Supper, paragraph 87).
The consecrated elements must always be treated reverently, in other words with fear, respect, affection, and honor.