Unbound stopped working after months of container running healthy

[AirAlarm]

Hello, thank you for this project. The container was working fine for me for the last couple of months.
Until today unbound stopped working (as I understood). Pihole answered all the requests with SERVFAIL status. Pretty much all of the websites stopped loading. I've checked my configuration to be sure nothing was changed, as I don't usually tinker with projects that are already in a working condition.
I'm a newbie so don't really know how to share my logs with you or any other meaningful information, so I will be very thankful if you could help me troubleshoot this issue. For now I returned to a regular pihole container, without the addition of unbound, otherwise nothing would work for me.

[koehdaniel]

Had the same issue after a short connectivity loss.
Restarted the container after restoring the internet connection and then it worked again.
Probably smarter to create your issue in the official unbound-Repo since it is not specifically to this combination of pihole with unbound.