Using HA after shutdown - no internet access/working offline

Hi all,
I am using HA for a while and absolutely love it.
I have one major issue which I cannot overcome – using HA with raspberry pi 3b+ or 4b offline.
I’m fully aware that HA must get access to valid NTP server for time sync with each startup.

I have followed these instruction

made CONFIG USB with timesyncd.conf file with the following:

[Time]
NTP=192.168.40.200
FallbackNTP=192.168.40.200

have valid local NTP server on 192.168.40.200

Put it in my raspberry during startup, no errors in the log, but after the first shutdown and reboot, if there’s no internet access the HA will not restart.

Since it’s crucial to have stable system even if there is internet loss, any idea how to configure it properly to restart even after Internet loss?

Thanks
Irmi

Will appropriate any tip for the ability to restart Home assistant without internet access.

Many thanks.