Enable rebuild for image based deployment

For hosts provisioned via image based provisioning using a vmware compute
resource the Build button at the top for "enable rebuild on next host boot"
is grayed. I'm not sure if this is by design or something I'm doing wrong.
It seems rebuilding an image based deployment would be desirable: delete vm
and re-clone from template.

I found that this is grayed out but is still clickable, not sure if that is a bug and were not supposed to use it. Either way it doesn’t seem to work and was wondering if anyone knows if it should or shouldn’t and if there is any documentation on it.