Recently, I stopped receiving alerts on the Companion App. After some investigating, the reason was simply that I had recently activated a firewall on the host where KVM was running, which was then blocking outgoing HTTP requests that HA made for the notifications. Of course this was visible in the system logs that showed errors for these requests. But from an user perspective it would have been much more helpful if e.g. a failed notification to a mobile device would at least show up in the HA notifications as such. Especially considering that such notifications are set up for critical events, which then silently don’t get signaled anymore.
Settings → System → Logs
Very likely the failed notification was logged there. If that is too annoying to access you can set up an automation that watches the system log for those sorts of errors and generates persistent notifications.
Very likely the failed notification was logged there
Yes, as mentioned it was visible there.
set up an automation that watches the system log for those sorts of errors
What would be the recommended way to do so?
This feature request is basically to make that behavior the default.