Steps to reproduce:
Start the BankOfCorda and BigCorp nodes, but not the NotaryService
At the shell for the bank run
to transfer monies to big corp. The payment flow will be stuck while it waits for the notary
Query BigCorp's vault and you will see the cash payment went through:
However the payment flow progress tracker on the bank node hasn't moved on from the "Requesting signature by Notary service" step. You're forced to use Ctrl+C to return back to the shell prompt, where you'll now see that the flow result printed to the screen.