Tiles on maxzoom not requested

[pnorman]

I added http://127.0.0.1:8000/tilejson.json as a new vector source and let Fresco auto-generate the layers. This file is as below.

{
    "attribution": "\u00a9 OpenStreetMap contributors - https://openstreetmap.org/copyright",
    "maxzoom": 14,
    "minzoom": 0,
    "name": "osm",
    "scheme": "xyz",
    "tilejson": "3.0.0",
    "tiles": [
        "http://127.0.0.1:8000/v1/{z}/{x}/{y}.mvt"
    ],
    "vector_layers": [
        {
            "fields": {},
            "id": "bridges",
            "maxzoom": 14,
            "minzoom": 12
        },
        {
            "fields": {},
            "id": "ferries",
            "maxzoom": 14,
            "minzoom": 10
        },
        {
            "fields": {},
            "id": "public_transport",
            "maxzoom": 14,
            "minzoom": 11
        },
        {
            "fields": {},
            "id": "sites",
            "maxzoom": 14,
            "minzoom": 14
        },
        {
            "fields": {},
            "id": "ocean",
            "maxzoom": 14,
            "minzoom": 0
        },
        {
            "fields": {},
            "id": "boundary_labels",
            "maxzoom": 14,
            "minzoom": 0
        },
        {
            "fields": {},
            "id": "pier_lines",
            "maxzoom": 14,
            "minzoom": 12
        },
        {
            "fields": {},
            "id": "addresses",
            "maxzoom": 14,
            "minzoom": 14
        },
        {
            "fields": {},
            "id": "water_lines",
            "maxzoom": 14,
            "minzoom": 5
        },
        {
            "fields": {},
            "id": "land",
            "maxzoom": 14,
            "minzoom": 6
        },
        {
            "fields": {},
            "id": "pier_polygons",
            "maxzoom": 14,
            "minzoom": 12
        },
        {
            "fields": {},
            "id": "boundaries",
            "maxzoom": 14,
            "minzoom": 2
        },
        {
            "fields": {},
            "id": "dam_polygons",
            "maxzoom": 14,
            "minzoom": 14
        },
        {
            "fields": {},
            "id": "streets_labels_points",
            "maxzoom": 14,
            "minzoom": 12
        },
        {
            "fields": {},
            "id": "pois",
            "maxzoom": 14,
            "minzoom": 14
        },
        {
            "fields": {},
            "id": "street_polygons",
            "maxzoom": 14,
            "minzoom": 11
        },
        {
            "fields": {},
            "id": "street_labels",
            "maxzoom": 14,
            "minzoom": 14
        },
        {
            "fields": {},
            "id": "streets",
            "maxzoom": 14,
            "minzoom": 5
        },
        {
            "fields": {},
            "id": "place_labels",
            "maxzoom": 14,
            "minzoom": 4
        },
        {
            "fields": {},
            "id": "water_polygons_labels",
            "maxzoom": 14,
            "minzoom": 5
        },
        {
            "fields": {},
            "id": "water_polygons",
            "maxzoom": 14,
            "minzoom": 6
        },
        {
            "fields": {},
            "id": "aerialways",
            "maxzoom": 14,
            "minzoom": 12
        },
        {
            "fields": {},
            "id": "buildings",
            "maxzoom": 14,
            "minzoom": 14
        },
        {
            "fields": {},
            "id": "dam_lines",
            "maxzoom": 14,
            "minzoom": 14
        }
    ]
}

Critically, this has a zoom range of 0-14. When I zoom into 13 and pan around I see requests for tiles. When I zoom into 14, the map rendering disappears and as I pan no tiles are requested.

I have verified that no tiles are being requested with both the dev tools in browser and the server log.