Web interface should be accessible after a reboot following initial install or pihole -r.
Actual Behaviour:
Web admin does not resolve at static IP address after reboot following either initial install or pihole -r. Web admin is available following install or a pihole -r reconfiguration, but fails to resolve once OS is rebooted. Another symptom: http://pi.hole/admin is also inaccessible.
Status check indicates DNS is running and blocking is enabled following reboot.
Correct, Pi-hole static ip is timing out: ERR_CONNECTION_TIMED_OUT
I'm going to check my Ubiquiti USG and switch to see if there is something I am missing. It's odd that it happens after reboot from fresh Pi-hole installs
Do you only get that error when trying to access the web page from another device? Are you able to load the web interface on the Pi-hole device (at least via curl)?