Boson Netsim password

[adv1_star_11]

I think Boson Netsim has a bug.

I create a secret password - 000
I create a password - wow

then:
Router_01#copy running-config startup-config

Router_01#reload


Router_01>enable
password: (000)


Router_01# configure terminal
Router_01(configure)#enable secret cisco
Router_01(configure)#exit
Router_01#exit

Router_01>enable
password: (cisco)
Router_01#reload
.
.
.
Router_01>enable
password: (000)
Enter password: (cisco)
Router_01#


I thought that when you restart the router. The RAM is flushed and the configuration file in NVRAM (startup-config) is loaded. Obviously this isn't the case. Can somebody please help?