I have a custom name server. ns1.buildingautomationmonthly.com. It has propagated according to DNS checker. I can go to philzito.com and buildingautomationbook.com which are both using the name server (they both also show propagation in the DNS checker site).
However, buildingautomationmonthly.com which has the same name server is not propagating after 12 hours. My only thought is that since I am using a private registration for the buildingautomationmonthly.com that is causing the delay? But why would that be the case as that should have nothing to do with DNS to IP resolution.
All of my domains come from GoDaddy and I've triple checked that they have the same settings.