devcontainer ci image cache is never working

[crimsonvspurple]

In dc github action I have

      - name: Dev Container Build and Run Action
        uses: devcontainers/[email protected]
        with:
          imageName: ghcr.io/${{ github.repository_owner }}/devcontainers
          imageTag: latest
          runCmd: |
            mvn --version
            whoami
            ls -lash /home/vscode
            echo "Dev Container can start up! Let's push!"

this builds and pushes the DC.

In deploy github action I have:

      - name: Dev Container Build and Run Action
        uses: devcontainers/[email protected]
        with:
          imageName: ghcr.io/${{ github.repository_owner }}/devcontainers
          cacheFrom: ghcr.io/${{ github.repository_owner }}/devcontainers
          # platform: linux/amd64,linux/arm64
          push: never
          runCmd: |
            whoami
            ls -lash /home/vscode/
< then a lot more things>

This always rebuilds the container instead of loading it from cache.

What am I doing wrong?