Changing date time will cause the X11 restart

I am using SCO Unix System V/386 Release 3.2v4.2 in some legacy machine.

I find that when I change the date time of the system, it will sometimes restart to the scologin page

It seems to be related to the X11 because other sessions (not scologin session) will not be affected.

Is there any one know the reason and how to solve or workaround?

Thanks!!