supervisor: CoreDNS keep failing, no external web API call working.

Home Assistant release with the issue: 0.98.1

Operating environment (HassOS/Generic): HassOS 2.12 running on a RasPi 3

Supervisor logs: 19-09-01 10:56:51 WARNING (MainThread) [hassio.tasks] Watchdog found a problem with CoreDNS plugin! 19-09-01 10:56:51 WARNING (MainThread) [hassio.tasks] CoreDNS plugin is in fails state / Reset config 19-09-01 10:56:51 INFO (MainThread) [hassio.dns] Start CoreDNS plugin 19-09-01 10:56:51 INFO (SyncWorker_15) [hassio.docker.interface] Clean hassio_dns application 19-09-01 10:56:54 INFO (SyncWorker_15) [hassio.docker.dns] Start DNS homeassistant/armv7-hassio-dns with version 1 19-09-01 10:57:11 WARNING (MainThread) [hassio.tasks] Watchdog found a problem with CoreDNS plugin! 19-09-01 10:57:11 WARNING (MainThread) [hassio.tasks] CoreDNS plugin is in fails state / Reset config 19-09-01 10:57:11 INFO (MainThread) [hassio.dns] Start CoreDNS plugin 19-09-01 10:57:11 INFO (SyncWorker_4) [hassio.docker.interface] Clean hassio_dns application 19-09-01 10:57:14 INFO (SyncWorker_4) [hassio.docker.dns] Start DNS homeassistant/armv7-hassio-dns with version 1 19-09-01 10:57:31 WARNING (MainThread) [hassio.tasks] Watchdog found a problem with CoreDNS plugin! 19-09-01 10:57:31 WARNING (MainThread) [hassio.tasks] CoreDNS plugin is in fails state / Reset config ....

Description of problem: I’m running HassIO on Raspi3, with Supervisor 184 and HA 0.98.1. I’m still having issue with dns even after having tried everything i found on community. This is what system logs look like after a while, with CoreDNS plugin keeping going in error. If I try eny action related to a web call (like calling a Particle API, or a DarkSky API), error show up in HA logs.

I’m using PiHole as DNS resolver, running on another machine, and I have configured it on this RasPi 3, together with fixed ip.

What do I need to make it work again? What information do you need from my side to help the investigation?

Thanks