For those annoying pi-hole issues you have to deal with.
This is in regards to a ticket I opened up and I am not the only one with this issue. Read the ticket here: pi-hole/pi-hole#3484
Please add to your rc.local file the follow code: https://github.com/themaverick/pihole-patches/blob/master/rc.local
And reboot your system to keep your Pi-Hole online