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Expected Behaviour:
Running 2 Pi-hole instances on separate Raspberry Pis (2B and 3B+) along with Cloudflared DoH proxies. I've updated both servers to the latest version of Pi-hole and Cloudflared. Was working fine for the last couple of weeks.
Actual Behaviour:
Now it seems that the Pi-hole DNS service on both Pis is stopping randomly. After a reboot Pi-hole works for some time, but then the web interface says "lost connection to api". I run a pihole status command and it shows the DNS service is not running. I also get an issue where when I try the pihole -r command to repair the installation, it cannot resolve to download FTL. Once I edit the resolv.conf file to 1.1.1.1 I am able to run the pihole -r utility (this may be a separate issue?) But even after a repair the DNS service keeps crashing on both Pis.