@Estel,

In my case both date and time are reset (date is like 01/01/2009). I will try later deactivating the 10osso_startup_wizard script and see what date/time I get when rebooting.

Just for the record, in /var/lib/osso-startup-wizard I have:
[State]
changed-without-pin=no
last-valid-sim-id=2620....
settings-changed=yes
sim-seen=yes

I will now turn off completely. Then boot to console and while in the console check the above file. Then exit/minireboot with deactivated osso-startup-... and check the file again (possibly with a wrong date and time, but for testing it's OK).