Thank you for the additional information, now I have a clear idea about what is happening.
- Installedfeom EPEL
Netdata official packages are not installed from EPEL, we use another server https://packagecloud.io/netdata/netdata and you can take more information in our learning site https://learn.netdata.cloud/docs/agent/packaging/installer/methods/packages.
About the error you are having, I remembered today that when the multihost was merged, we started to have problems with foreach alarms, but 8 days ago the PR https://github.com/netdata/netdata/pull/9712 was merged and the problem was fixed. If you install the nightly Netdata using RPMs or compiling Netdata using kickstart, you will have your alarms working as expected.
We would like to apologize you and all our users for this problem.