When is containerStatuses set?

Hello everyone !

We’ve observed that at some point in the creation of a new pod, the field spec.status.containerStatuses is not set (the key does not exist in spec.status).

Is that something that is expected ? We are thinking that this is only true for a small amount of time but it caused a bug with a library we are using.

Thank you

Cluster information:

Kubernetes version: 1.18 and 1.20
Cloud being used: AWS
Installation method: Console
Host OS: ubuntu