Cannot save image using podman

I have an issue to save image in podman.
When the image I want to save is from redhat using this command:
podman save -o testRedHat.tar 53ce4390f2ad

A signature error shown like this:
Getting image source signatures
Checking if image destination supports signatures
Error: Can not copy signatures to docker-archive:testRedHat.tar: Storing signatures for docker tar files is not supported

This is the image id:
registry.access.redhat.com/ubi8 latest 53ce4390f2ad 5 weeks ago 233 MB

Did anyone know how to fix this issue.

Here are the example that are working:

Thanks.