No icon when begins a new day

WD ver 10.19o and 10.19p. Every night automatically my pc shuts down at 0:15 AM (after graphs update) and restarts next day at 7:00 AM. During all day icons are ok (from 7:00AM to 0:15 AM). When starts next day at 7:00AM i have blank screen in icon space and no weather icon during all day. What happen?