Rabbi Sholom Ber Schapiro, Director of the Nissan Mindel Publications (NMP), presents “Historic Treasures.”
Each program shares ‘treasures’ from the archives of Rabbi Schapiro’s father in law, Rabbi Dr. Nissan Mindel OBM, a prolific writer who served as a personal secretary of the 6th and 7th Chabad Rebbes.
The program uncovers fascinating stories, rare artifacts and precious documents from the Chabad-Lubavitch movement.
VIDEO:
In the second seif the Rebbe says ביים רבי’ן איז דאך ניט שייך קיין ענין פון שכחה והדומה
This seems to answer the question.
Also I don’t see the connection between if the Rebbe can forget and if everything the Rebbe says must happen.