Tried out the beta version and the Custom DNS works 
I did noticed some minor issues which should be fixed:
- The entries are actually written to "/etc/pihole/custom.list" and not "/etc/hosts" as suggested by the webpage
- The backup / teleporter is not including the custom.list but is including /etc/hosts
In the current released version, I have gone a different route to resolving the issue. I have added a file in /etc/dnsmasq-d called 09-static-dns.conf where I have listed my static hosts:
host-record=,,
In my opinion, this would be a better option as this uses dnsmasq for the static hosts and the teleporter already by default includes all files in /etc/dnsmasq.d
As a side note, I have added several files in /etc/dnsmasq.d to enable pxe/tftp and also some dns domain specific forwards. Works really well and is automatically included in teleporter
