FYI, I just noticed in the manual that it says:
Hedging is prohibited for US based accounts due to NFA Compliance Rule 2-43(b), so this variable must be either at 0 or 4 when the NFA flag is set.
I did not realize I need to set both NFA flag and Hedge=0 (I assumed NFA flag also prevented hedging).
Since the default is Hedge=1, that could be the source of the problem I experienced. I'll try setting both NFA flag and Hedge=0 to see if it runs more smoothly.
