UEFI PXE Booting Issues When using Proxy Mode on DRP subnet

[michaelrice]

I have the following subnet:

{
  "ActiveEnd": "192.168.1.254",
  "ActiveLeaseTime": 600,
  "ActiveStart": "192.168.1.6",
  "Available": true,
  "Bundle": "",
  "Description": "",
  "Documentation": "",
  "Enabled": true,
  "Endpoint": "",
  "Errors": [],
  "Meta": {
    "color": "black",
    "icon": "cloud",
    "title": "User added"
  },
  "Name": "ens160",
  "NextServer": "",
  "OnlyReservations": false,
  "Options": [
    {
      "Code": 1,
      "Value": "255.255.255.0"
    },
    {
      "Code": 3,
      "Value": "192.168.1.1"
    },
    {
      "Code": 6,
      "Value": "192.168.1.50"
    },
    {
      "Code": 15,
      "Value": "mrice.internal"
    },
    {
      "Code": 28,
      "Value": "192.168.1.255"
    },
    {
      "Code": 42,
      "Value": "192.168.1.50"
    }
  ],
  "Pickers": [
    "hint",
    "nextFree",
    "mostExpired"
  ],
  "Proxy": true,
  "ReadOnly": false,
  "ReservedLeaseTime": 7200,
  "Strategy": "MAC",
  "Subnet": "192.168.1.93/24",
  "Unmanaged": false,
  "Validated": true
}

When the machine I want to provision is running as a VM on ESXi 6.x or newer when the machine loads its PXE stuff it goes straight into grub. When I am on a subnet where I do not have to use proxy mode then it works as expected.