Running Customize task on ESXi fails

I'm currently trying to add Clone support for a single ESXi.
As the Clone task is not supported on ESXi, I'm deploying a OVF to the ESXi.
After that I would run a customization to change IP/Hostname/DNS using Customize(spec=customspec)
When I try to use the same vim.vm.ConfigSpec ,which works for normal deploy on a vCenter server, with a ESXi VM, it fails:

pyVmomi.VmomiSupport.NotSupported: (vmodl.fault.NotSupported) {
   dynamicType = <unset>,
   dynamicProperty = (vmodl.DynamicProperty) [],
   msg = 'The operation is not supported on the object.',
   faultCause = <unset>,
   faultMessage = (vmodl.LocalizableMessage) []
}

Is there a way around it?

Start by reproducing the ESXi deployment flow described in the issue, using an OVF, Customize(spec=customspec), and the vim.vm.ConfigSpec that works through vCenter. Investigate where the NotSupported fault is raised and whether the operation is supported for an ESXi VM. Done requires a confirmed cause and a documented, tested workaround or a clearly scoped project change.