Have you verified that your drive parameters match your motor nameplate data? For hoist motor RPM use the FL RPM not the rated RPM (for example rated RPM 1200, FL RPM 1173, use 1173 in the drive). Perform an auto-tune of the motor with the drive if you haven't already, and perform a brake calibration if you haven't already. Then check for any rollback, mess with speed pick delay if you still have any.
