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Consider patching https://github.com/aspnet/Extensions/issues/1041 in 2.2

See original GitHub issue

Impact

It’s not possible to set the Period of the health check publisher hosted service without using reflection. The wrong backing field is set.

This isn’t very discoverable because the bug manifests in a setting not being honoured. You might think you are publishing health data every 30 seconds, but it’s going to always use the default period.

Workaround

The workaround is to use reflection.

Risk

The risk here is that someone is setting Period - which actually sets Delay and they are relying on this detail. If a user actually wanted to set Delay, they can already do that.