Does Mapbox geocoding API support intersections outside US?

According to the Mapbox geocoding API docs, it supports searching for intersections of two roads through the following API call:

https://api.mapbox.com/geocoding/v5/{endpoint}/{street_1}%20and%20{street_2}.json

The example listed in the docs (Market Street / Fremont Street, San Francisco) works:

$ curl "https://api.mapbox.com/geocoding/v5/mapbox.places/Market%20Street%20and%20Fremont%20Street.json?types=address&proximity=-122.39738575285674,37.7925147111369453&access_token=[TOKEN]"

{
  "type": "FeatureCollection",
  "query": [
    "market",
    "street",
    "and",
    "fremont",
    "street"
  ],
  "features": [
    {
      "id": "address.826558382307746",
      "type": "Feature",
      "place_type": [
        "address"
      ],
      "relevance": 1,
      "properties": {
        "accuracy": "intersection"
      },
      "text": "Fremont Street",
      "place_name": "Market Street and Fremont Street, San Francisco, California, United States",
      "center": [
        -122.3982976,
        37.791734
      ],
      "geometry": {
        "type": "Point",
        "coordinates": [
          -122.3982976,
          37.791734
        ]
      },
      ...
    },
    ...
  ]
}

but when I search for somewhere outside the US (e.g. King Street / Collins Street, Melbourne), it never returns an intersection:

$ curl "https://api.mapbox.com/geocoding/v5/mapbox.places/William%20Street%20and%20Collins%20Street.json?access_token=[TOKEN]&country=au&types=address&proximity=144.95979,-37.81638"

{
  "type": "FeatureCollection",
  "query": [
    "william",
    "street",
    "and",
    "collins",
    "street"
  ],
  "features": [
    {
      "id": "address.6899530118768598",
      "type": "Feature",
      "place_type": [
        "address"
      ],
      "relevance": 0.716667,
      "properties": {
        "accuracy": "street"
      },
      "text": "Williams Street",
      "place_name": "Williams Street, St Arnaud Victoria 3478, Australia",
      "center": [
        143.25317765,
        -36.62076935
      ],
      "geometry": {
        "type": "Point",
        "coordinates": [
          143.25317765,
          -36.62076935
        ]
      },
      ...
    },
    ...
  ]
}

As far as I can tell, the geocoding intersection search only works for US-based addresses. I've tried different combinations of the country, proximity and bbox parameters to no success.

US-based addresses work:

• "Market Street and Fremont Street, San Francisco" (used in the docs example)
• "Broadway and Columbus Avenue, New York"

Non US-based addresses don't work at all:

• "Collins Street and William Street, Melbourne"
• "Eagle Street and Queen Street, Brisbane"
• "George Street and Grosvenor Street, Sydney"
• "Oxford Street and Tottenham Court Road, London"
• "Avenue Des Champs-Élysées and Place Charles de Gaulle, Paris"

How do I get Mapbox geocoding intersection search to work for non-US addresses?

If this is not possible, is it documented anywhere? Nothing in the docs indicates that this is not available world-wide, and I can't think of any reason why it wouldn't be.