Custom boot image

I have a Verizon s5 on NE9 (4.4.2), and I'm rooted or so I thought.

The last couple times I've restarted my device, I haven't seen the unlocked image rift before the red Verizon splash screen.

I'm just wondering if something has happened to my root? Why would it just revert back to the non-rooted boot image?

I also secretly like the unlock image more than the plain Jane image, but I am wondering what happened.

Thanks in advance.

Brett

P.S. root checker still tells me I'm rooted.