[2.5, UI] maas 2.5 pods webUI used memory calculation is incorrect

2.5.0~beta2 (7291-gd0345ced5-0ubuntu1~18.04.1)
maas admin pod read 91
Success.
Machine-readable output follows:
{
    "id": 91,
    "memory_over_commit_ratio": 1.2,
    "used": {
        "cores": 40,
        "memory": 19090,
        "local_storage": 100000000000
    },
    "type": "virsh",
    "host": {
        "system_id": "43fg4x",
        "__incomplete__": true
    },
    "tags": [
        "virtual"
    ],
    "total": {
        "cores": 4,
        "memory": 15910,
        "local_storage": 117082529792
    },
    "available": {
        "cores": -36,
        "memory": -3180,
        "local_storage": 17082529792
    },
    "capabilities": [
        "composable",
        "dynamic_local_storage",
        "over_commit",
        "storage_pools"
    ],
    "default_macvlan_mode": "",
    "name": "node01ob20",
    "zone": {
        "name": "default",
        "description": "",
        "id": 1,
        "resource_uri": "/MAAS/api/2.0/zones/default/"
    },
    "storage_pools": [
        {
            "id": "938e9162-16b7-4e51-9c70-40b7396b2413",
            "name": "maas",
            "type": "dir",
            "path": "/var/lib/libvirt/maas-images",
            "total": 117082529792,
            "used": 100000000000,
            "available": 17082529792,
            "default": true
        }
    ],
    "cpu_over_commit_ratio": 10.0,
    "architectures": [
        "amd64/generic"
    ],
    "pool": {
        "name": "default",
        "description": "Default pool",
        "id": 0,
        "resource_uri": "/MAAS/api/2.0/resourcepool/0/"
    },
    "resource_uri": "/MAAS/api/2.0/pods/91/"
}

10 VMs created with 1909 MiB RAM = 19090 MiB or 18.6 GiB (2^10)

Memory available should show 0

Web UI (/usr/share/maas/web/static/partials/pod-details.html) shows:

18.6 GiB used -3.552713678800501e-15 GiB available