Packer timeout with Proxmox VE because the VM don't start on disk

When I use the nightly Packer version (Packer v1.6.6-dev) and when I add "boot": "order=scsi0;ide2" in my builder file, the boot order are correct.

Source: https://github.com/hashicorp/packer/issues/10252#issuecomment-731231284