Bypass Lock screen on reboot

I have a verizon Galaxy S5 on OG5 and when I reboot the phone I am able to access apps prior to the lock screen appearing. On a reboot the homescreen comes up and I can sometimes enter my messages, gchats, or open Pandora for 1 or 2 seconds before the lock screen will appear and even read the private messages.

Is this normal for the device? It seems like a big security hole.