Conversation so far:
Was I Heard It Through The Grapevine a recording by producer Norman Whitfield?
Producer Norman Whitfield recorded I Heard It Through the Grapevine with various Motown artists.
What other recordings did they make, besides I Heard It Through The Grapevine?
Besides I Heard It Through The Grapevine, the first known recording is with the Miracles on August 6, 1966, though there may also have been a recording with the Isley Brothers

Question: Did that recording go missing?
Self-contained rewrite: Did a recording of I Heard It Through The Grapevine go missing?