This was a well-known incident, although needless to say the press has always deified FDR and kept a lid on it as far as possible. Hitler and Stalin were pals at the time, busy dividing up Poland, and Roosevelt, good Communist that he was, didn’t want to do anything to spoil the party.
And needless to say the media, led by the NY Times, which won its first Pulitzer Prize for covering up for Stalin in Ukraine, was all on board.
But Wyman isn't alone, and the historians have more or less done their job on this topic.