It might be normal, but.
When i restart(only restart) my pc and all programs and tray icons are loaded. Norton go's from green to red a brief moment ussualy only a second. On time i opened Norton360 after restart and when i ran Norton closed its service for a few maybe 5 seconds.
After i changed in the settings "scan on start" it don't happen again.
I asume this is becaus of loading the program. But just to be sure?