Its possible he was already seeing the light..
From ‘Warlords, the heart of conflict 1939 – 1945’ by Simon Berthon and Joanna Potts.
P298
Evidence that a niggling doubt had now lodged in Roosevelt’s mind surfaced the next day (March 30 1945). He asked the lend-lease administrator Leo Crowley: ‘How much do the Russians owe us?’ Crowley replied that it was somewhere in the region of eleven billion dollars. Roosevelt told him that Henry Morgenthau had suggested the Soviets be given ten billion more. Crowley said he was opposed to this. Roosevelt agreed. ‘I have yet to get any concessions from Stalin,’ he remarked. ‘We are getting down to the tail end of the war. I do not want you to let out any more long-term contracts on Lend-Lease,’ he ordered Crowley, ‘further, I want you to shut off Lend-Lease the moment Germany is defeated.’ He also conveyed his anxieties to an aide, Chester Bowles: ‘We’ve taken a great risk here, an enormous risk, and it involves the Russian intentions. I’m worried. I still think Stalin will be out of his mind if he doesn’t cooperate, but maybe he’s not going to; in which case, we’re going to have to take a different view.’