OSConfig troubleshoot fails at connection check if Cloud NAT is used #468

I have additionally enabled Private Google Access in target subnet (even though it highlight that CloudNAT is compensates that), didn't help.

Is the OS Config API enabled? Yes
Is the OS Config agent enabled? Yes
Is the OS Config agent up to date? Yes
Is a service account present on the instance? Yes
Is the OS Config Service account present for this instance? Yes
Does this instance have a public IP or Private Google Access? No