Cannot reproduce wind visualisation Raster MTS example

We are looking to use the Raster MTS to serve NetCDFs, but we've struggled with our uploaded Tilesets reporting sum_area: 0 and not having any data when we open them in Mapbox Studio. Eventually, we tried to reproduce the wind visualisation example exactly, but even this appears to have this problem.

I've downloaded the NetCDF supplied on the page as gfs-wind.nc. Here's the recipe, as specified on the example page (I've substituted in our account name and the source name), saved as recipe-gfs.json:

{
  "version": 1,
  "type": "rasterarray",
  "sources": [
    {
      "uri": "mapbox://tileset-source/example-org/gfs-wind"
    }
  ],
  "minzoom": 0,
  "maxzoom": 3,
  "layers": {
    "10winds": {
      "tilesize": 256,
      "resampling": "bilinear",
      "buffer": 1,
      "source_rules": {
        "filter":
        [
		      ["all",["==",["get","NETCDF_VARNAME"],"u-component_of_wind_height_above_ground"],
        	["==",["get","NETCDF_DIM_height_above_ground2"],"10"]],
        	["all",["==",["get","NETCDF_VARNAME"],"v-component_of_wind_height_above_ground"],
        	["==",["get","NETCDF_DIM_height_above_ground2"],"10"]]
				],
        "name": ["to-number", ["get", "NETCDF_DIM_time"]],
				"sort_key":["to-number",["get","NETCDF_DIM_time"]],
        "order": "asc"
			}
    }
  }
}

Then I've run:

tilesets upload-raster-source example-org gfs-wind ./gfs-wind.nc
tilesets create example-org.tiles-gfs-wind --recipe recipe-gfs.json --name "Test - GFS wind"
tilesets publish example-org.tiles-gfs-wind

When I run tilesets job, I get output that includes:

"layer_stats": {
    "10winds": {
      "minzoom": 0,
      "maxzoom": 3,
      "zooms": {
        "0": {
          "sum_area": 0
        }
      }
    }
  },

And in Mapbox Studio link supplied by tilesets job we see the following:

Start by reproducing the documented wind visualisation example with the supplied gfs-wind.nc, recipe-gfs.json, and the listed tilesets commands. Inspect the tilesets job output, especially layer_stats and sum_area; the issue is done when the example produces populated zoom levels and visible data in Mapbox Studio.